I'm the son and grandson of US Army veterans. I'm also the grandson of a resistance fighter against Japanese forces in WWII. And the great nephew of underground resistance fighters against the Nazis.
None of them did it to pursue dominance or to celebrate a flag. They did it for principles, and to help create the world they wanted to see. In particular, one that was inclusive and participative: a rejection of nationalism and fascism.
To everyone who has served for similar reasons: thank you.