Final answer:
Timur's invasion temporarily weakened the Ottoman state by revealing the disloyalty of absorbed Turkish vassals, leading to their abandonment of Bayezid I at the Battle of Ankara and contributing to a temporary breakdown in Ottoman control.
Step-by-step explanation:
The invasion by Timur was a significant event that influenced the development of the Ottoman state. It did not lead to the collapse of the Ottoman Empire, but rather temporarily weakened it. At the Battle of Ankara, the defeat and capture of Bayezid I and his sons by Timur's forces revealed a fundamental weakness within the Ottoman state. The unwilling Turkish vassals, who were absorbed into the Ottoman administration after their conquest, had little loyalty to Bayezid. They abandoned him during Timur's attack, seeking to regain their freedom from Ottoman control. This treachery left the state temporarily leaderless and encouraged Turkish vassals to break away. Despite this setback, the Ottoman state eventually recovered, went on to conquer Constantinople in 1453 under Mehmed II, and continued to develop into a powerful empire