After the death of Madhavrao Peshwa in 1772, his brother Narayanrao became peshwa (ruler) of the Maratha Empire. Narayanrao was murdered by his palace guards in August 1773, and his uncle Raghunathrao (Raghoba) became Peshwa. However, Narayanrao's wife, Gangabai, gave birth to a posthumous son, who was the legal heir to the throne. The newborn infant was named 'Sawai' Madhavrao ("Sawai" means "One and a Quarter"). Twelve Maratha chiefs, known as the Baarbhai and led by Nana Phadnavis, directed an effort to install the infant as the new Peshwa and to rule in his name as regents.