As BSB said, it's nationalism.
They're like us at the height of empire - "we're the big dogs so we're just gonna act like dicks to everybody else". We've been there, come out the other side and grown up.
As for their reverence for servicemen it's literally lip service. Their VA is an absolute mess and they provide very little support, both financial and healthwise (especially mental health) because it's the country of the individual and everyone should be responsible for themselves. But hey "thanks for your service". Fuck off with the fake gratitude and give them a decent pension and the aftercare they severely need for risking their life for the country. It's got the biggest military budget in the world and is bigger than something like the next 9 combined, so they can fucking afford it if they want to.
If the idea of being proud of ourselves is to be more like America, I'd rather not.
That doesn’t reflect my experience over there over the years, where I have met people who genuinely seem to love their country. There’s also the lot who chant ‘USA, USA’ at everything but I’m not talking about them. If you’ve seen or experienced different then so be it but can only take it as I’ve found it
I cant really comment in detail on US military pensions etc as ive never looked into but did just googled and saw comments from ex military that were mainly positive (in terms of free college fees, health benefits, support etc). I was talking more as the public in general rather than government anyway.