system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel]Why did Logan join American Wars/Conflicts?

He does hold himself someone patriotically as a Canadian, making sure Fury understands that when he's about to ask him to dive into Vietnam to fight symbiotes.

But he fought in the Pacific during WW2 where Canadian support wasn't that prevalent, but more interestingly, he fought in the civil war, a war where Canada didn't much have a horse in the race.

Why is that at time he's behaving more like a mercenary with a steady moral compass, but at times, he's just jumping into conflicts he's got no real stake in?
gpt
He's matured over the years, but for a long time he just loved a fight for it's own sake.

He's nearly immortal/invulnerable and has no other real skill set beyond violence.  In a war situation he gets paid, is respected and admired by the men and sought after by the ladies.

He was probably in other conflicts that we haven't seen yet.