Saiyid Abdullah Khan was the most powerful noble during the reign of Bahadur Shah and Jahandar Shah.

Background:
Bahadur Shah was the seventh Mughal emperor of India and ruled from 1707 to 1712. Jahandar Shah was his successor and ruled from 1712 to 1713. Both these emperors faced challenges from various nobles who wanted to gain power and influence.

Role of Saiyid Abdullah Khan:

1. Rise to Power: Saiyid Abdullah Khan was a prominent noble who served under both Bahadur Shah and Jahandar Shah. He rose to power due to his military and administrative skills.

2. Military Campaigns: Saiyid Abdullah Khan played a key role in various military campaigns and expeditions. He led successful campaigns against the Marathas and the Sikhs in Punjab.

3. Administrative Reforms: Saiyid Abdullah Khan was also known for his administrative reforms. He introduced measures to improve revenue collection and reduce corruption in the administration.

4. Influence at the Court: Saiyid Abdullah Khan was a trusted advisor of both Bahadur Shah and Jahandar Shah. He had a significant influence at the court and was involved in the decision-making process.

5. Downfall: However, Saiyid Abdullah Khan's rise to power and influence also led to his downfall. He was accused of conspiring against Jahandar Shah and was ultimately executed in 1714.

Conclusion:
Saiyid Abdullah Khan was a powerful noble during the reign of Bahadur Shah and Jahandar Shah. He played a key role in military campaigns, administrative reforms, and had significant influence at the court. However, his downfall serves as a reminder of the dangers of political intrigue and power struggles in Mughal India.