Something someone pointed out-"The introduction of Star and Stripe brings up the potentially fascinating and fertile ground of exploring what the hero system looks like outside of Japan as well as how the superhero system affects international politics. Instead, when a Japanese-based villain like Shigaraki and an American hero like Star and Stripe duke it out, any discussion of foreign superheroes effectively dies with her defeat and is swept under the rug completely. Given the involvement of US Air Force fighter jets in her attack on Shigaraki, which ends with her death, the battle would be considered by both countries as well as the United Nations to be an unambiguous act of war between Japan and the United States, but any potential repercussions are completely forgotten about and left-unexplored with no explanation except from a token Hand Wave that AFO is using his international contacts to prevent foreign powers from intervening, which seems implausible at best."
So...errr would they be at war or what?