I wasn't born a radical ancom, I've just been moving further and further leftlib as I get older, from a conservative christian start. but it's not like being one interferes with military duties, centrists, progressives, and leftists are essential in the military to keep reactionaries from committing the countless war crimes they join to commit, the rape, murder, and pillage they desire and their reason for joining. they do it and get away with it too much because there aren't enough of us, but it would be 100x worse if the military was full of nothing but reactionaries
there's a lot of progressive and leftist veterans, the US military is a really good cross section of US society