If you did want to adjust this type of outfit in future though I would suggest a slightly smaller shirt as this one is a little long in the sleeves and you’ve got that excess fabric around the waist.
Tucking in the shirt more temporarily fixes the excess fabric though. I find pulling the shirt down by the hand via the fly works well. Obviously don’t have fabric coming through the fly and remember to rezip.
I was more suggesting that America inserts itself into other countries conflicts sometimes with benevolent intentions, other times not so much.
Either way America never seems to see a war it doesn’t like.