This exerpt comes from Wikipedia under the heading of The Conscription Crisis of 1944. There was a conscription crisis in World War 1 too.

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The Conscription Crisis of 1944 was a political and military crisis following the introduction of forced military service in Canada during World War II. It was similar to the Conscription Crisis of 1917, but was not as politically damaging. Because conscription was declared late in the war, only 2463 conscripted men reached the front lines. Out of these, 79 lost their lives.

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So of the men who were drafted in 1944 to fulfill the needs for more troops most remained on the home front. You can see by the excerpt above that very few went to the front lines. It took 9 men to support and supply 1 warrior on the fighting front. So the drafted men ended up being in support and some were trained to fight but the war ended soon after they were ready to fight the Nazis.