The important characteristics of the Vijayanagar administration was the Amara-Nayaka system. The top-grade officers of the army were known as Nayaks or Palaiyagars or Poligars. These officers were granted land in lieu of their services.
After the death of Ali Adil Shah II in 1672 CE, Sikandar Adil Shah was placed on the throne of Bijapur in 1672 at four years of age. This weakened the kingdom and was ultimately annexed by Emperor Aurangzeb in 1686 CE.
After the death of Achyuta Deva Raya, the succession was disputed. His son, Venkata I also called as Venkata Raya or Venkatadri Raya, succeeded him, but he was a weak ruler and was killed six months later.
Some of the causes of Ibrahim Lodhi’s defeat in First Battle of Panipat were: 1. Babur used Artillery in the battle and Indian soldiers were not familiar with the use of artillery.2. The army of Babur was better disciplined and fully trained and well equipped.3. The country was divided into petty states and small principalities.