With tensions of the Cold War between the US and USSR rising, the USSR created the fastest interceptor jet to ever be created which had the US intimidated. Though the US knew they had to create something better. Hence the creation of the F-15 Eagle. The F-15 is the best fighter jet ever created for multiple reasons. One main reason is the jet’s ability to do any mission if needed: Intercept other aircraft, air-to-air combat, or even air-to-ground strikes.

Another reason is the design of the aircraft. The jet has two engines, so if one fails it can still fly. Even with only one wing, it can still fly. Based on a real event, during a training exercise another jet collided with an F-15 removing its right wing and even though the entire right wing was GONE, it was still able to land safely. In general, this aircraft can pretty much fly even if it's missing multiple crucial structural frames. On top of that, it is very easy to be upgraded and refitted with up-to-date technology. Since 1972, it has had three variants and a total of fourteen upgrades. Last but not least, the F-15 has a kill ratio of 100 to 0, 100 enemy aircraft shot down and 0 F-15 shot down whilst in combat. That's why I believe the F-15 is the best aircraft ever manufactured, other opinions might change depending on other factors like agility, stealth capabilities, and other factors.