In 1948, the 2nd Battalion was amalgamated with the 1st Battalion. The battalion was one of the first British units to serve in Korea, arriving there in September 1950 as part of the 27th British Commonwealth Brigade. Its first major action, in the battle of Naktong, the battalion was involved in a tragic friendly fire incident, in the fight for Hill 282. The Argylls were noted for their reoccupation of the Crater district of Aden, under controversial Commanding officer, Lieutenant Colonel Colin Campbell Mitchell, during the Aden Emergency in the mid 1960s.