y. The remaining portions of the district like Udayagiri were conquered in 1512 by Krishnadeva Rayalu, the greatest king of the kingdom. The ruins of fortress built by the Vijayanagar kings in the 14th century are at Udayagiri.
The Nawabs and the British period
After the fall of the Vijayanagara Empire, the area was ruled by the Nawabs. It was under rule of Najeebullah, the brother of Arcot Nawab in 1753. The district witnessed wars between Najeebullah and Nawab with support from French at Machilipatnam and British at Madras. Army under colonel Cailluad took over Nellore fort in 1762 and handed it over to Nawab. On the assignment of revenues, Nawab Ajim Ud Duaula gave Nellore town back in 1781 and gave the rest of the district to East India company in 1801. East India Company had taken control appointed Mr. Dyton as the 1st Collector. Nellore was declared the revenue unit for the district.
During the British period, the district was at peace, the only event of any political importance being the sequestration in 1838, of the Jagir of Udayagiri, owing to its title holder's participation in a conspiracy, engineered by the Nawab of Kurnool, against the ruling power. After the district came under the British administration, the jurisdiction of the district did not undergo any major changes, but for the transfer of Ongole taluk in 1904 to Guntur district when it was newly constituted.
Post Indian Independence
It was part of the composite Madras State until 1 October 1953. On 1 November 1956, when the states were reorganised on a linguistic basis, this district came under Andhra Pradesh. Nellore played a major role in the formation of Andhra Pradesh state. Potti Sriramulu, a Telugu patriot and activist, fasted to death for the formation of Andhra Pradhesh state. His sacrifice resulted in the
