Explanation:

In 1819, the territory occupied by the present Sirsa district was taken over by the British and it became part of the North Western district of the Delhi territory. In 1820, the North Western district was bifurcated into Northern and Western districts and this territory became part of Western district, which was later renamed Haryana district. In 1837, it was separated from Haryana district and merged with newly formed Bhattiana district. In 1858, Bhattiana district was transferred to Punjab Province and renamed Sirsa district. In 1884, Sirsa district was abolished, its two tehsils, Sirsa and Dabwali were merged to form Sirsa tehsil, which became part of Hissar district of Punjab Province. On 1 November 1966, it became part of newly formed state of Haryana. In 1968, Sirsa tehsil was again bifurcated to Sirsa and Dabwali tehsils. The present district was carved out on 1 September 1975 by amalgamating Sirsa and Dabwali tehsils of erstwhile Hissar district.