Background:
In 1719, the Sayyid brothers, Abdullah Khan and Hussain Ali Khan, played a significant role in the deposing of Farrukhsiyar, the Mughal emperor of India. They were supported by Peshwa Balaji Vishwanath, who was a high-ranking official in the Maratha Empire. This event marked a turning point in the power dynamics of the Mughal Empire and led to a rise in Maratha influence.

Dethroning Farrukhsiyar:
The Sayyid brothers were discontented with the rule of Farrukhsiyar due to his weak leadership and his favoritism towards certain courtiers. They saw an opportunity to seize power and approached the Peshwa Balaji Vishwanath for assistance. The Peshwa, recognizing the potential benefits of supporting the Sayyid brothers, agreed to help them in their endeavor.

Alliance:
The alliance between the Sayyid brothers and the Peshwa proved to be successful in their plot to dethrone Farrukhsiyar. They gathered a sizable army and marched towards Delhi, where the Mughal court was located. The troops loyal to the emperor were defeated, and Farrukhsiyar was captured and imprisoned.

Aftermath:
With Farrukhsiyar removed from power, the Sayyid brothers installed another contender, Muhammad Shah, as the new Mughal emperor. However, the Sayyid brothers and the Peshwa maintained significant influence over the Mughal court and effectively controlled the administration.

Impact:
The dethroning of Farrukhsiyar and the subsequent rise of the Sayyid brothers and the Marathas signaled a decline in the authority of the Mughal Empire. The Marathas, under the leadership of the Peshwa, became the de facto power in northern India and exerted their influence over the Mughal court.

Conclusion:
In 1719, the Sayyid brothers, with the help of Peshwa Balaji Vishwanath, successfully dethroned Farrukhsiyar, the Mughal emperor of India. This event marked a turning point in the power dynamics of the Mughal Empire and led to an increase in Maratha influence.