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how many kings did the mughal empire witness in 1719
After Bahadur Shah The First's death in 1712, the Mughal dynasty sank into chaos and violent feuds. In 1719 alone, four emperors successively ascended the throne.
what happened next after four emperors successively ascended the throne of the mughal empire in 1719
During the reign of Muhammad Shah, which started in 1719, the empire began to break up, and vast tracts of central India passed from Mughal to Maratha hands.

Question: when did the emperor reign
Self-contained rewrite: when did muhammad shah reign