 The 1st Commonwealth Division was formed on 28 July 1951 , with the division including the 25th Canadian , 28th British Commonwealth and 29th British infantry brigades under the command of Major General James <unk> , and was part of US I Corps . Since its formation , the division had occupied part of the west @-@ central sector of the UN line , approximately 48 kilometres ( 30 mi ) north of the capital Seoul . The 28th Brigade included three infantry battalions — the 1st Battalion , King 's Own Scottish Borderers ( 1 KOSB ) , 1st Battalion , King 's Shropshire Light Infantry ( 1 <unk> ) and the 3rd Battalion , Royal Australian Regiment — under the command of Brigadier George Taylor . During this period 3 RAR was commanded by Lieutenant Colonel Francis Hassett . Peace @-@ talks at <unk> during July and September led to a lull in the fighting and 3 RAR undertook mainly defensive duties , helping to construct the defences of the Kansas Line south of the Imjin River , as well as conducting extensive patrolling on the northern side . The battalion also used the reduced operational tempo as an opportunity to train reinforcements . The period culminated in a limited , and largely unopposed , divisional advance 12 kilometres ( 7 @.@ 5 mi ) north of the Imjin to the Wyoming Line , codenamed Operation <unk> , in September . 
