> Canada has been involved in every war that the US has been in my lifetime

Since the US is Canada's largest trading partner, this will always be the case, but there are huge and important differences in the level of involvement. Famously the level of involvement in the Iraq war was almost non-existent. Canada's involvement consisted of patrolling surrounding waters, and approximately 100 Canadian soldiers who were embedded in American forces as a sort of culteral military exchange[1].

[1] https://en.wikipedia.org/wiki/Canada_and_the_Iraq_War