We fought in a lot of stupid wars in the past.
I would not hesitate to fight in WWII, that war was absolutely necessary.
But WWI was stupid. That was Europe's mess. Wilson made a huge mistake to get America involved.
The basic problem with joining the military has always been that service is subject to political decisions. But then I am with Washington, and I would not have it any other way. Hopefully people would have the choices of resigning or never enlisting.