Some more info regarding Canadian concripts in WWII:
MacKenzie King's big saying of the day was: "Conscription if necessary, but not necessarily conscription!" (hehe, weasle speak exemplified)
It started with the passing of the National Resources Mobilization Act (NRMA) in 1940 which gave the gov't the power to use the Nation's manpower as it saw fit. This disturbed Quebec, so MacKenzie King stated that the NRMA related "soley and exclusively to the defence of Canada on our own soil and in our own territorial waters."
As the war progressed, MacKenzie King finally acquiesced to most of his cabinet colleagues and in Nov 1944, Parliament voted to send 16,000 NRMA men overseas. In the end, only 13,000 of them went overseas. 2,463 served in the front line, and 69 were killed.
Although his conscription policy limited the potential damage to national unity, it did deprive the army of the resources it needed, when it needed them.