 Meanwhile , the organisation of British Commonwealth ground forces fighting in Korea as part of the United Nations Command had undergone considerable change in the months following the battles of the Imjin River and <unk> in late @-@ April 1951 . 3 RAR had been transferred from 27th British Infantry Brigade to the 28th British Commonwealth Brigade when that formation departed for Hong Kong . Meanwhile , after protracted negotiations between the governments of Australia , Britain , Canada , India , New Zealand and South Africa , agreement had been reached to establish an integrated formation with the aim of increasing the political significance of their contribution , as well as facilitating the solution of the logistic and operational problems faced by the various Commonwealth <unk> . 
