Why did the knights fail?

The knights failed primarily due to a combination of strategic miscalculations, logistical challenges, and evolving military tactics. Their heavy armor and traditional combat methods became less effective against more mobile and coordinated forces, such as infantry armed with longbows or gunpowder weapons. Additionally, the knights often faced internal divisions and lacked the necessary support and resources for sustained campaigns. Ultimately, these factors diminished their effectiveness on the battlefield and contributed to their decline in power.