Invasion of Poland:
Germany opened its campaign on September 1, 1939, committing roughly 1.5 million troops, supported by about 2,700 tanks and 2,300 aircraft. Armored spearheads equipped mainly with Panzer I, II, III, and IV tanks advanced rapidly from East Prussia and Silesia, while the Luftwaffe’s Ju 87 Stukas and Heinkel He 111 bombers destroyed rail lines, depots, and Polish airfields. Polish forces, totaling about 950,000 men but with far fewer armored vehicles and limited anti-tank capability, attempted to form defensive lines along the Vistula and Narew Rivers but were quickly outflanked.

Within the first week, German divisions achieved breakthroughs near the Polish Corridor and in southern Poland, cutting supply routes and isolating units. The coordination between the armored and air elements—one of the first real applications of combined-arms doctrine—proved decisive. Civilians in Germany heard of these successes through state-controlled radio and newsreels that emphasized speed and precision. By mid-September, with Soviet troops advancing from the east, organized Polish resistance collapsed.

Warsaw fell after heavy bombing and street fighting that left much of the city destroyed. German casualties were approximately 16,000 killed and 30,000 wounded, while Polish losses reached about 70,000 killed, with hundreds of thousands taken prisoner. The rapid outcome confirmed to the German High Command that the new style of mechanized warfare could secure swift, decisive victories and avoid the static trench conditions of the previous war.

The Phony War:
Following the occupation of Poland, approximately 100 German divisions were deployed along the western frontier opposite France and Belgium. For nearly eight months, there was little active fighting. The Wehrmacht used this time to reorganize and expand its armored and air formations. Tank production increased sharply, adding more Panzer III and IV models with 37 mm and later 50 mm guns, while Luftwaffe squadrons received newer Bf 109E fighters and He 111 bombers.

On the civilian front, rationing began, and the economy shifted toward sustained war production. German propaganda described the lull as evidence that Britain and France lacked the courage to attack, though within the army staff, it was clear that time favored the Allies’ rearmament. By the winter of 1939–40, Germany had about 2.5 million men under arms in the west, preparing for a decisive offensive once weather and logistics allowed.

Invasion of Denmark and Norway:
In April 1940, Germany launched simultaneous operations against Denmark and Norway using roughly 120,000 men, 1,000 aircraft, and strong naval elements. Denmark capitulated within hours. In Norway, airborne and seaborne assaults captured Oslo, Trondheim, and Narvik, but German naval losses were severe: ten destroyers and several cruisers were sunk by British forces.

The operation nevertheless succeeded in securing access to Swedish iron ore and forward bases along the Norwegian coast. German troops, supported by Ju 52 transport aircraft and Ju 87 dive-bombers, overcame Allied and Norwegian resistance after two months of fighting. Around 5,000 Germans were killed, while Norwegian and Allied losses were roughly twice that number.

Although costly, the campaign provided valuable combat experience for airborne and mountain units. It also extended the northern perimeter of the Reich and offered bases for U-boat and Luftwaffe operations in the North Atlantic, which would soon become crucial.

Battle of France:
On May 10, 1940, Germany attacked in the west with about 3 million men, 2,500 tanks, and 3,500 aircraft organized into three army groups. The main thrust advanced through the Ardennes, surprising the Allies, who had concentrated forces in Belgium. Panzer divisions equipped with Panzer III and IV tanks crossed the Meuse River near Sedan under the cover of massive Luftwaffe bombing by Ju 87s and He 111s.

Once the breakthrough was achieved, mechanized columns advanced rapidly to the Channel, encircling large Allied forces in northern France. The British Expeditionary Force and elements of the French 1st Army were trapped at Dunkirk; about 338,000 men were evacuated across the Channel, leaving behind almost all heavy equipment. German losses during this phase were roughly 27,000 killed and 111,000 wounded, while the Allies lost around 360,000 men captured or killed.

After regrouping, German forces resumed their offensive in June. Paris fell on the 14th, and the French government sought an armistice on June 22. The campaign demonstrated the effectiveness of concentrated armor, air support, and flexible command. Civilians in Germany viewed the victory as proof of national resurgence; Hitler’s popularity reached its height. The Wehrmacht, however, was aware that Britain’s refusal to surrender meant the war was far from over.

The Battle of Britain:
Following France’s defeat, Germany prepared for an invasion of the British Isles, requiring air superiority. The Luftwaffe deployed approximately 2,600 aircraft—Bf 109 and Bf 110 fighters, He 111 and Do 17 bombers, and Ju 87 Stukas—against roughly 700 British Spitfire and Hurricane fighters. The air offensive began in July 1940 with attacks on shipping, radar installations, and airfields in southern England.

Initial results were favorable, but the RAF’s integrated radar network and rapid pilot replacement system allowed it to sustain losses. By September, German bomber formations were suffering heavy casualties. In response, bombing shifted to London and industrial cities, beginning the Blitz. Over 20,000 civilians were killed in Britain, while the Luftwaffe lost more than 1,700 aircraft and thousands of aircrew.

By October, the campaign had failed to achieve air superiority, forcing postponement of the planned invasion. For the first time, Germany faced a strategic defeat. The outcome prompted the regime to refocus efforts on economic self-sufficiency and new theaters where rapid, decisive victories still seemed possible.

The Battle of the Atlantic:
Concurrent with the fighting in the air, Germany waged a campaign at sea aimed at cutting Britain’s supply lifelines. The Kriegsmarine began with about 57 operational U-boats, each armed with torpedoes and deck guns. Under Admiral Dönitz, submarines operated in coordinated “wolf packs,” using radio intercepts to converge on convoys. In 1940–41, they sank an average of 300,000 tons of shipping per month, peaking later at more than 600,000.

Germany also deployed surface raiders such as the battleships Bismarck and Scharnhorst and auxiliary cruisers disguised as merchantmen. The Bismarck’s sortie in May 1941 ended with its sinking after damaging HMS Hood, a dramatic event that captured attention across Germany. Propaganda presented the U-boat campaign as a strategic equalizer against Britain’s superior fleet.

By 1943, however, Allied advances in radar, sonar, long-range aircraft like the B-24 Liberator, and escort carriers sharply reduced German success. U-boat losses rose to over 40 percent per patrol. Though German crews continued operating until the war’s end, the campaign’s failure ensured Britain’s survival and secure trans-Atlantic supply lines.

The North African Campaign:
To support Italy’s struggling army, Germany deployed the Afrika Korps in early 1941 under General Erwin Rommel. Initially comprising two light armored divisions with around 150 Panzer III and IV tanks, it later expanded to about 250,000 men. The campaign became a contest of mobility across the deserts of Libya and Egypt. Rommel’s forces achieved early victories, retaking Cyrenaica and besieging Tobruk.

In mid-1942, the German–Italian force reached El Alamein, 100 kilometers from Alexandria. Equipment shortages, overstretched supply lines, and Allied control of the sea gradually eroded its strength. When the British Eighth Army counterattacked in October 1942, supported by over 1,000 tanks and superior artillery, the Axis line broke. Simultaneously, American and British troops landed in North Africa from the west.

After months of fighting in Tunisia, the remaining Axis forces—about 250,000 men—surrendered in May 1943. German tank losses totaled roughly 2,000 throughout the campaign, while Allied losses were somewhat higher but quickly replaced. For Germany, the defeat marked the loss of the southern Mediterranean and foreshadowed the growing strain on its global military commitments.

Invasion of the Soviet Union:
Germany launched its massive eastern offensive on June 22, 1941, committing approximately 3 million men, 3,500 tanks, 7,000 artillery pieces, and 2,500 aircraft along a 1,800-mile front. The operation was divided among three army groups: North toward Leningrad, Center toward Moscow, and South toward Ukraine. The armored spearheads consisted largely of Panzer III and IV models, supported by motorized infantry and Luftwaffe units including Bf 109 fighters and Ju 87 Stuka dive bombers.

Initial advances were staggering. Within weeks, German forces encircled hundreds of thousands of Soviet troops at Bialystok, Minsk, and Smolensk. The Soviet Union, however, mobilized enormous reserves—millions of additional troops and thousands of T-34 and KV-1 tanks, which surprised German commanders with their superior armor and firepower. The Luftwaffe initially achieved air dominance, destroying much of the Soviet Air Force on the ground, but supply lines soon became overstretched, and the advancing formations suffered heavy attrition.

By autumn, German troops were deep inside Soviet territory, having advanced over 1,000 kilometers. Yet logistical failures, inadequate clothing, and vehicle wear began to erode combat strength. German planners had anticipated a short campaign, but by October the Red Army still resisted. As the weather turned, the Wehrmacht faced mud, freezing temperatures, and growing opposition. Though hundreds of thousands of Soviet prisoners were taken, German casualties already numbered over 300,000, signaling a long, exhausting struggle ahead.

Battle of Moscow:
By late 1941, about 1.8 million German troops and over 1,500 tanks converged on Moscow. Despite early successes capturing Bryansk and Vyazma, delays caused by poor roads and weather reduced momentum. Supply columns broke down, and fuel shortages immobilized many mechanized units. The infantry advanced in subzero temperatures with limited winter equipment, as the Soviet counteroffensive grew in strength.

In December, reinforced by Siberian divisions well-equipped for the cold, the Red Army counterattacked with approximately 1 million troops, supported by T-34 tanks and new Katyusha rocket artillery. The German front lines wavered and then withdrew. For the first time in the war, the Wehrmacht was forced into a large-scale retreat. Approximately 150,000 German soldiers were killed, and tens of thousands suffered frostbite or illness.

The failed assault marked a strategic turning point. In Germany, news was carefully censored, but privately, the high command recognized that a quick victory over the Soviet Union was no longer attainable. Civilian morale remained high for the moment, as propaganda framed the setback as temporary, but the strain on manpower and industry had begun to show.

Siege of Leningrad:
To the north, Army Group North surrounded Leningrad (St. Petersburg) in September 1941, beginning a siege that would last nearly 900 days. About 725,000 German troops and their Finnish allies maintained the encirclement, supported by artillery and the Luftwaffe. Their aim was to starve the city into submission rather than engage in costly urban combat.

Inside Leningrad, more than 2 million civilians endured famine and bombardment. German artillery units, equipped with 150 mm and 210 mm guns, pounded the city’s infrastructure, while aerial attacks destroyed food depots. Despite repeated offensives, German forces failed to seize the city completely, facing determined Soviet resistance.

By 1943, the front had stabilized, with the Red Army opening supply routes across Lake Ladoga. The siege tied down hundreds of thousands of German troops that could not be used elsewhere. Though the Germans held the outer perimeter until early 1944, the prolonged operation drained resources and offered little strategic benefit.

The Eastern Front in 1942:
In 1942, Germany renewed its offensive in the south, aiming to seize the Caucasus oil fields and the city of Stalingrad. Approximately 1.5 million men and 2,000 tanks were assigned to the campaign. Panzer divisions received upgraded Panzer IV F2 models with long-barreled 75 mm guns, while the Luftwaffe deployed He 111 and Ju 88 bombers to support ground operations.

At first, the advance succeeded. German forces captured Rostov and reached the Volga near Stalingrad. However, splitting the offensive between the Caucasus and the city stretched lines dangerously thin. By late summer, as the Red Army concentrated on the Volga bend, the Wehrmacht’s mobility declined due to fuel shortages and mechanical failures.

Civilian morale in Germany remained relatively stable, buoyed by initial reports of continued progress. Yet within the officer corps, there was growing concern that the scale of the Soviet war effort had been underestimated. Production could not fully replace the mounting tank and aircraft losses, and supply routes from Germany to the distant front became increasingly vulnerable to partisan attacks and the harsh terrain.

Battle of Stalingrad:
By September 1942, the German Sixth Army under General Paulus and elements of the Fourth Panzer Army began the assault on Stalingrad, supported by approximately 1,000 tanks, 1,200 aircraft, and 1 million artillery shells. The Luftwaffe’s initial bombing reduced much of the city to rubble, but this turned the ruins into ideal defensive terrain for the Soviet defenders. The Red Army fought tenaciously, holding key positions such as the tractor factory and the grain elevator.

By November, the German army had captured most of the city, though at heavy cost—over 150,000 casualties. At this point, Soviet forces launched a massive counteroffensive from the north and south, encircling approximately 250,000 Axis troops in the city. The relief attempt led by Field Marshal Manstein’s forces failed to break through. Supplies dwindled; the Luftwaffe, attempting to airlift food and ammunition, could deliver only a fraction of what was needed.

In February 1943, Paulus surrendered the remnants of his army—91,000 men, most of whom would never return from captivity. Total German and Axis losses exceeded 300,000, while Soviet casualties were estimated at over 1 million. The defeat had a profound impact in Germany: public confidence in the war’s outcome began to waver, and the Wehrmacht lost its aura of invincibility.

Battle of Kursk:
In the summer of 1943, Germany launched its last major offensive in the east, aimed at eliminating the Soviet salient near Kursk. The attacking force numbered about 900,000 men, 2,700 tanks—including new Tiger and Panther models—and 2,000 aircraft. The Soviets, anticipating the attack, had constructed massive defensive belts totaling thousands of mines, anti-tank guns, and trenches.

The battle began on July 5 with intense armored clashes around Prokhorovka. Despite superior German tank firepower, Soviet T-34s and artillery inflicted heavy losses. Luftwaffe units achieved temporary local air superiority with Bf 109 and Fw 190 fighters, but Soviet aircraft soon overwhelmed them through sheer numbers. Within ten days, German advances stalled, and the Red Army counterattacked on multiple fronts.

Germany lost around 50,000 men and more than 300 tanks, while Soviet losses were far higher but sustainable due to immense reserves. The failure at Kursk ended Germany’s ability to conduct large-scale offensives on the Eastern Front. Thereafter, the Wehrmacht fought a strategic withdrawal, and production shifts at home focused increasingly on defensive weapons such as the Panther tank, assault guns, and V-weapon programs.

The Western Front and the Normandy Invasion:
By mid-1944, Germany faced a two-front war. In the west, roughly 1.9 million German troops were stationed along the Atlantic Wall, supported by about 1,500 tanks and assault guns and 800 aircraft under the Luftwaffe’s Western Command. Many divisions were understrength, equipped with older Panzer IVs and a few Tiger and Panther tanks.

On June 6, 1944, the Allies landed on the beaches of Normandy with approximately 156,000 men, 5,000 ships, and nearly 12,000 aircraft. The German defenses consisted of static divisions, many made up of conscripts and older soldiers, positioned behind obstacles and minefields. The Panzer divisions, including the elite 12th SS Panzer Division “Hitlerjugend,” were held in reserve and delayed by confusion, Allied air superiority, and conflicting orders.

German counterattacks at Caen and later at Mortain failed under constant air bombardment. The Allies’ material superiority—thousands of Sherman tanks, fighter-bombers such as the P-47 Thunderbolt and Typhoon, and endless supplies—gradually broke the German line. By late August, after the Falaise Pocket, over 200,000 German troops were killed or captured, and France was effectively lost. The Wehrmacht retreated toward the German frontier with depleted strength and dwindling reserves.

On the home front, the Allied bombing campaign intensified. German cities such as Hamburg, Berlin, and Dresden were subjected to continuous raids by RAF and U.S. bombers, destroying industrial areas and killing hundreds of thousands of civilians. Despite this, armament production peaked in 1944 under Albert Speer, reaching its highest output of tanks, aircraft, and artillery, though too late to alter the war’s course.

The Eastern Front: Soviet Advance into Poland and the Balkans:
While the Western Allies fought in France, the Red Army launched massive summer offensives in the east. By this stage, the Soviet Union fielded nearly 6 million troops with overwhelming superiority in tanks—more than 10,000 T-34s and heavy IS-2s—and artillery. Germany could muster roughly 2.5 million men along the entire eastern front, supported by about 2,000 tanks and assault guns and 1,500 aircraft.

Operation Bagration, launched in June 1944, destroyed Army Group Center. Over 25 German divisions were encircled and annihilated, resulting in approximately 300,000 casualties and vast equipment losses. Soviet armored spearheads advanced over 600 kilometers in less than two months, liberating Belarus and reaching the outskirts of Warsaw. German attempts to establish new defensive lines along the Vistula and Carpathians slowed but did not stop the offensive.

Throughout late 1944, Soviet forces entered the Balkans and Romania, aided by local uprisings and defection of former Axis allies. The Wehrmacht evacuated Greece and much of the Balkans under heavy pressure, losing vital oil supplies from Ploiești. On the home front, German civilians began experiencing large-scale evacuations from the east as Soviet forces advanced. The strain on the army’s manpower led to the mobilization of older men and Hitler Youth units, as well as the creation of the Volkssturm militia for homeland defense.

The Western Front: Battle of the Bulge:
Facing relentless pressure, Hitler ordered a surprise counteroffensive in the Ardennes in December 1944. The goal was to split the Allied front and capture Antwerp, forcing a political settlement. The attack involved approximately 400,000 German troops, 1,500 tanks—including the new King Tiger—and 2,000 artillery pieces. Facing them were about 600,000 Allied troops with large numbers of tanks, anti-tank guns, and constant air support once weather improved.

The offensive began on December 16 under heavy fog, which initially grounded Allied aircraft and allowed German armored spearheads to advance rapidly. Panzer divisions broke through thin American lines, encircling units such as those at Bastogne, where U.S. paratroopers held out despite being surrounded. German columns captured large quantities of supplies but soon faced fuel shortages, as the advance depended on seizing Allied depots.

By early January 1945, the weather cleared, and Allied air power returned in full force. The Luftwaffe launched its last major effort, Operation Bodenplatte, sending about 1,000 fighters and bombers against Allied airfields, but losses were catastrophic—nearly 300 aircraft destroyed. The German ground offensive collapsed shortly afterward. Total German casualties in the Ardennes were around 100,000 men and nearly all remaining western tank reserves, while Allied losses numbered about 80,000. The failure exhausted Germany’s ability to launch further large-scale operations.

Collapse on the Eastern Front:
In January 1945, the Red Army launched its final offensive along the Vistula. Over 2 million Soviet troops, 6,000 tanks, and 40,000 artillery pieces smashed into 400,000 German defenders. Within weeks, the front collapsed. Soviet spearheads reached the Oder River, less than 80 kilometers from Berlin. To the south, other Soviet formations advanced through Hungary and captured Budapest after a brutal siege that cost nearly 100,000 Axis troops.

German forces were now fragmented. The remnants of Army Group North were trapped in the Courland Pocket, while those in East Prussia fought to hold Königsberg. The Luftwaffe could muster only about 1,000 operational aircraft, mostly Me 109 and Fw 190 fighters, often flown by inexperienced pilots. Fuel shortages grounded much of the remaining armored strength; production of the advanced Panther and Tiger II tanks continued, but they were too few to change the outcome.

Civilian morale deteriorated rapidly. Refugee columns fled westward ahead of the Soviet advance, suffering severe hardships in winter conditions. Propaganda still promised “final victory,” but most Germans realized defeat was inevitable. Hitler remained in Berlin, refusing evacuation or negotiation, directing phantom divisions on maps that no longer reflected battlefield reality.

Battle of Berlin:
The final battle began in mid-April 1945, when over 2.5 million Soviet troops supported by 6,000 tanks and 7,500 aircraft attacked the German capital. The defending forces numbered around 1 million, though many were Volkssturm militia, police, and remnants of shattered divisions. The defense relied on the remains of Army Groups Vistula and Center, along with SS units and foreign volunteers, but they lacked coordination, fuel, and ammunition.

Soviet artillery unleashed one of the heaviest bombardments in history, leveling much of the city’s outer districts. The fighting quickly turned into house-to-house combat. The Germans employed Panzerfaust anti-tank weapons and a few surviving Tiger and Panther tanks for ambushes, but their effect was limited. Luftwaffe activity was negligible; a few sorties by jet-powered Me 262s did not influence the outcome.

By late April, Soviet troops encircled the city. Hitler remained in his bunker, issuing futile orders to nonexistent armies. On April 30, he took his own life. The following day, German forces in Berlin surrendered. On May 8, 1945, Germany capitulated unconditionally to the Allies.

Aftermath
The war had consumed Germany entirely. Approximately 5.5 million German soldiers were dead, along with millions of civilians from bombing, starvation, and displacement. Industrial centers lay in ruins, cities were destroyed, and the surviving population faced occupation and division. The once-dominant Wehrmacht ceased to exist, and what remained of the nation entered a period of military, political, and moral collapse.

From the German perspective, the conflict had begun with rapid victories born of technological and tactical innovation but had devolved into a catastrophic struggle of attrition against superior resources. The war’s end left Europe divided, and Germany partitioned, its army disbanded, and its people left to confront the consequences of total defeat.