Military service is a hard concept to grasp when you're sitting comfy at home, not a care in the world and all the conflicts are "over there".
It's a very different story when there is an existential threat looming over your head, weighing on your shoulders like a mountain. Canada's armed forces is already meeting its yearly recruitment targets due to repeated threats of invasion from the United States.
There are. Heaps of them.
The US is just a big place and very spread out. And the ruling government and its media conglomerates are trying to keep them out of the media.