Field service forage cap, Bihar Light Horse, 1920 (c)

Dark blue side hat, standard type, with white cloth piping, silver stud plate studs and a white metal boar cap badge.

After the Indian Mutiny of 1857 concerns about future unrest and the threat to the European minority in Bihar led to the formation of an unofficial corps. It was raised as a defence force by planters of the Tirhoot and Chapra districts in Bihar, India. The Soubah Behar Mounted Rifles Volunteer Corps was formerly established in 1862.

The auxiliary formation grew in size and reputation. In December 1883 the men of the Bihar Light Horse were invited to Calcutta to participate in exercises and drills. On 4 January 1884 the unit took part in the Proclamation Day proceedings where they were commended for their appearance by General Wilkinson, officer commanding in Calcutta.

Over fifty members of the Bihar Light Horse volunteered for service in the Boer War and were enrolled in Lumsden's Horse in 1900.