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 Cassels , and was part of US I Corps .
The British Commonwealth Division consisted of the 25th , 28th and 29th Brigades under the command of Lieutenant General James `` Gentleman Jim '' Cassels ( later Field Marshal Sir James ) and was part of 1 Corps .