The 54th Sikhs (Frontier Force) were an infantry regiment of the British Indian Army. It was raised in 1846 as the 4th Regiment of Infantry The Frontier Brigade. It was designated as the 54th Sikhs (Frontier Force) in 1903 and became 4th Battalion (Sikhs) 12th Frontier Force Regiment in 1922. In 1947, it was allocated to the Pakistan Army, where it continues to exist as 6th Battalion The Frontier Force Regiment.