In the year of 610, Prophet Muhammad receives divine revelations and he dies 22 years later. The new religion takes the world by storm and its followers expand aggressively.

Muslim forces from Ifriqiya began to raid the wealthy coastal towns of Southern Italy in the year of 652. A series of conflicts between the Emperor and the Caliphate led to instability and unrest in Sicily. In the year of 902 most of the island of Sicily were conquered by Muslim raiders, establishing the Emirate of Sicily loyal to the Aghlabid Caliphate. A cultural and religious confrontation began between the Italian and Greek Christians and the Arabic Muslims.

William II is King of Sicily and spend most of his time in the third crusade together with several European kings, giving the crusade the name of the King's Crusade. He dies in 1189 with no children. The line of succession is clear, Constance, the daughter of Williams grandfather, Roger II, is the true heir.

Even through he had sworn fealty to Constance, as soon as the king died, Tancred, an illegitimate son of the Duke of Apulia, rebelled and seized control of the Island of Sicily. Tancred executes all other pretenders and controls Sicily with an iron fist. Persuaded by several influential nobles and diplomats, Pope Clement III supports the tyrannical Tancred, as the stability of Sicily is paramount for the ongoing crusades.

Just a year later in 1190, King Richard I of England arrives in Sicily and shortly after King Phillip II of France. This sparks immense unrest as King Richards sister Joan sits in a Sicilian prison as she was married to King William II of Sicily. As events unfolds, the crusaders burn and loot the city of Messina, Joan is released and both King Richard and Phillip recognizes Tancred's shady rule as legitimate.

Holy Roman Emperor Henry VI and Empress Constance had one child, Frederick, a man with ambitions beyond anyone in Europe at the time. He became Emperor in 1220 and ruled the Empire at its peak of power and used it to full extend. 

In the year of 1223, the 29 year old emperor was invited to a meeting with Pope Honorius III and John of Brienne, King of Jerusalem and The Latin Empire. The two others hoped to see the emperor support them in the sixth crusade and they had a deal no ambitious man could decline, the marriage of the emperor with John's daughter Isabella and the throne of Jerusalem. 

Frederick was married a total of four times and had a small army of both legitimate and illegitimate, secret and unknown children. 

His ambitions were unlimited, his greed and lust for power unmatched. The most unstable region in his gigantic empire was the Italian borders, being both King of Italy and Sicily with the Papal States caught in the middle, the borders let to many disputes and wars with the Papacy.  He was excummunicated three times and Pope Gregory IX announced him as the Antichrist.

King Conrad of Jerusalem was elected King of Germany by his father in 1235 when he is 7 years old, he marriages Elisabeth of Bavaria in 1246 and spends his time fighting William of Holland, a pretender to the King of Germany title. William's claim comes from Conrad's title being invalid as his father Frederick II was excommunicated. In 1252 Conrad and Elisabeth has a son, Conradin in Bavaria, Landshut.

While Conrad fights in Germany his brother, an illegitimate son of Emperor Frederick, Manfred rules Sicily as regent and is only 18 years old when the Emperor dies in 1250. Conrad and Manfred fights over their dead father's rich land in Sicily. Conrad is the legitimate heir, but Manfred won on the battlefield and Conrad died in 1254, as Sicily now is ruled by an illegitimate pretender, the Papacy claims The Kingdom of Sicily as a papal possession.
Conradin is left without a father at the age of 2 and stays in his Duchy of Swabia.

Charles of Anjou is crowned King of Sicily in Rome on the 5th of January 1266. Shortly after he invades Southern Italy and marches towards Napoli. Learning that Manfred is mustering his troops in Capua, Charles marches through the mountains of Apennines towards Benevento. Manfred's army compromised of German and Italian mercenaries and Saracen allies secures the city of Benevento before Charles can arrive. On the 26th of February, Charles forces annihilated the mercenaries and Saracens and slaughtered Manfred on the battlefield. 

Conradin were moved like a chess piece by greater lords, primarily influential lords in the Holy Roman Empire, Northern Italy and the King of Castile, all seeking to diminish the growing power of the Kingdom of France.

In the year of 1268, Conradin at the age of 16th led an army compromised of Italian, Spanish, Roman, Arab and German soldiers to the Battle of Tagliacozzo. The two armies of almost equal size and strength butchered each other into almost complete annihilation with almost total losses on both sides. Conradin fled the battlefield near its end and fled to Rome, were he was found by French supporters that arrested him and sent him to Napoli. Shortly after he was executed by Charles I of Anjou, The King of Sicily.

The riots at Easter in 1282 turned into a revolt. Over the next six weeks had the Sicilians retaken most of the large cities and around 4000 French were massacred.

King Charles of Anjou called for aid and was supported by The King of France. This led to several outside powers siding with both the Sicilians and The French.

This event led to a 20 year long conflict known as 'The War of the Sicilian Vespers'. Lots things happens, but to sum them up short.

In the year of 1284, The Kingdom of Aragon goes full in militarily against France and as an extension of The War of the Sicilian Vespers. France, supported by the Kingdom of Majorca, Navarre and The Republic of Genoa, France leads a military campaign into Catalonia, which Pope Martin IV called the "Aragonese Crusade" (Yes, Catholics can crusade Catholics). The French led armies consisted of over 135.000 soldiers that went down into 

2 years and a long story short, Aragon wins and annexes Majorca.