UK and Commonwealth OTL troop numbers in WW2. During the war the British Empire and Dominions raised a total of 8,586,000 men for military service. More than 5 million came from the British Isles, 1,440,500 from India, 629,000 from Canada, 413,000 from Australia, 136,000 from South Africa, 128,500 from New Zealand and more than 134,000 from other colonies.
Source- http://www.bbc.co.uk/history/ww2peopleswar/timeline/factfiles/nonflash/a6651218.shtml