his son Dharmapala (c. 781–821). The Pala Kings had peaceful possession of this district until the end of their rule over Bengal in the twelfth century. Dharmapala was the son of and successor to Gopala, extended his power beyond Pundravardhana. Like his father, he was a Buddhist and founded the Buddhist Vihara at Somapura Mahavihara in Varendra, the ruins of which in Naogaon District have been discovered. The Senas originally came from the Deccan Plateau and settled in West Bengal. Vijayasena was the first ruler of the dynasty. He defeated the last Pala king Madanapala and established his authority over the district. He was succeeded by his son Vallal Sena (1160–1178), who was in possession of the district. He built his capital at Bhabanipur Shaktipeeth, a Shakti Peeth in this district. Lakshmanasena (1178–1204), the son and successor of Vallal Sena, exercised authority over the district until he was driven out by Muhammad bin Bakhtiyar Khalji in 1204. Even after this date, a dynasty of Sena Rajas ruled over the north-eastern tract of this district for nearly a century as feudal chiefs of the Muslim rulers of Bengal. Their capital was at Kamalpur, a few miles to the north of Bhabanipur, a site of pilgrimage for Hindu devotees, and a little to the south of Sherpur Upazila. Achyuta Sena was the last prince of the line. British Era The present Bogra District was first formed in 1821 during British rule. In the 1901 census, the population of the district on a reduced area was around 854,533, an increase of 11% over the past decade, and it also revealed there was no town with a population above 10,000. The famous Prafulla Chaki (1888–1908) was born in this district. Post independence During the Bangladesh Liberation War of 1971, fighting occurred in the Bogra district during the Battle of Bogra between the allied troops of Mukti Bahini and Indian Army, and the Pakistan Army , with the former being victorious. In 2018, the Government of Bangladesh changed the spelling of the district's name from Bogra to Bogura. Geography and climate Formation of land The area consisting of Sariakandi Upazila, Gabtali Upazila, Sonatala Upazila, and the majority of Dhunat is called the eastern alluvial tract. It is fertilized by silt from floodwaters. The eastern alluvion is one of the most fertile and prosperous areas in Bogra; jute, aman paddy, sugarcane and pulses are locally grown.