1st Regiment of Sikh Infantry, Punjab Frontier Force

Known as 51st Sikhs

Chronology

1846 raised by Captain J. S. Hodgson at Hoshiarpur as 1st Sikh Infantry
1846-7 1st-4th Sikh Regiments formed as the Infantry of the Frontier Brigade
1847 became 1st Regiment of Sikh Local Infantry
1851 Frontier Brigade became the Punjab Irregular Force (Piffers) including the Corps of Guides, Punjab Irregular Force
1865 became 1st Regiment of Sikh Infantry, Punjab Frontier Force
1903 became 51st Sikhs (Frontier Force)
1922 became 1st Battalion (Prince of Wales' Own Sikhs) 12th Frontier Force
1945 became 1st Battalion (PWO Sikhs) Frontier Force Regiment
1947 allocated to Pakistan on Partition
1957 became 3rd Battalion Frontier Force Regiment