Whakaotihia te rerenga e whai ake nei: I muri i te Pakanga Tuatahi o te Ao, i whakahiatohia te 53rd Sikhs me te 51st, 52nd me te 54th Sikhs, me nga roopu e rua o nga Kaihauturu Kaihauturu hei hanga i te 12th Frontier Force Regiment i te 1922. Ko te 53 o nga Sikhs i noho hei 3rd Battalion (Sikhs) o te rerenga hou. Mo a raatau mahi pai i te Pakanga Tuatahi o te Ao, i hangaia he peihana 'Royal' i te 1935. I te Pakanga Tuarua o te Ao, i mahi a 3/12 FF me te rereketanga nui i te Itari o Awherika ki te Rāwhiti,
Ko Hiti, ko Itari, ko Kariki. I te tau 1947, i whakawhiwhia te Rōpū Kaha Rohe ki te Ope Taua o Pakistan. I te tau 1948, i whawhai a 3/12 FF i te Pakanga Kashmir ki Inia. I te tau 1956, i whakakotahihia te Frontier Force Rifles me te Pathan Regiment ki te Frontier Force Regiment, a, i whakaingoatia te 3/12 FF hei 5 FF. I te Pakanga Indo-Pakistani o te tau 1965, i tino kitea te peihana i te Pakanga o Khem Karan, i te Pakanga Indo-Pakistani o te tau 1971 i mahi i Kashmir. I whakawhiwhia te waeine ki te 5 Sitara-e-Jurrats me te 4 Tamgha-e-Jurrats i te wa o tana ratonga whai muri i te rangatiratanga.