Kammala jumla mai zuwa: An sake gyara 5th Battalion a 1939 a matsayin 2nd Line duplicate na 4th Battalion lokacin da aka ninka girman rundunar soji. Da farko, an sanya 5th Buffs zuwa Brigade na 37 na Infantry, wani ɓangare na 12th (Gabas) Infantry Division, wanda shine nau'in layi na biyu na 44th (Home Counties) Division. Koyaya, a ranar 26 ga Oktoba, 1939, an canza shi zuwa Brigade na 36 na Division a musayar 2/6th East Surreys. 5th Buffs, tare da 6th da 7th Royal West Kents, sun kasance a cikin Brigade na 36 don sauran yakin. Kamar na 2 da na 4 Battalions, ya yi aiki tare da BEF a Faransa a 1940 kuma ya yi yaƙi a yakin Faransa kuma an kwashe shi a Dunkirk. Rukunin na 12 ya sha wahala sosai saboda yawancin maza suna da ƙarancin horo kuma sashin ba shi da bindigogi ko raka'o'in tallafi. Bayan ya koma Ingila, an rushe rukunin a watan Yulin 1940, saboda raunin da ya samu. A cikin 1942, an sanya Brigade na 36 ga sabon rukunin 78th kuma ya shiga cikin Operation Torch, saukar da Allied a Arewacin Afirka, sannan ya biyo baya a yaƙin neman zaɓe a Tunisia, inda rukunin 78th, a matsayin wani ɓangare na Sojojin Farko na Burtaniya, ya bambanta kansa a lokacin da aka kama Longstop Hill. Ƙungiyar ta yi yaƙi a cikin
Yaƙin Sicilian, a matsayin wani ɓangare na Rundunar Sojoji ta 8 ta Burtaniya. 5th Buffs da sauran Rukunin 78th sun shiga cikin fada a Italiya kuma sun yi aiki a can har zuwa 1945 Offensive.