Where does one go to find out about the day-to-day of military life? In countries other than my own? I don't mean combat - I mean the boring routine. Basic training. What kind of food is served in the mess. How soldiers address each other, how one speaks to a superior or a subordinate. Who cleans the toilet. What regulations are relevant in the day-to-day. That sort of thing. I am looking for (a) relevant resources and (b) relevant research techniques, not "could you please tell me what it's like".
To clarify, I've done my three years in the Israeli Defence Forces, so I know what military service here looks like. Only, I also know that's not exactly how other militaries work. The big things are similar. The little details - not so much. As an example, the Mildly Military tv-trope lists under its real-life examples some elite units, and the whole of our army. (I guess we switch very easily between "civilians in uniform" and "soldiers". And "soldiers in plain-clothes", if need be. It was normal for me to tell my lieutenant "go to sleep, man. I'll take care of this [task]. I don't need a babysitter".)
What I'd like to find out is what military service in the US and the UK, for example, looks like. I mean, the "international space military whatever" most likely would not be formed and led by Israel, right? (Maybe the Israeli doctrine would be adopted worldwide, but that's a kind of choice I'd like to make after doing my research, not instead of.) To a certain extent, I'm looking for the things that are different - for the "culture shock" a soldier would experience, moving from one environment to another. At the moment, I've only got one point of reference. I want to have more.
So where do I go to find out about other militaries? There is the representation in films, but I don't know how much of it is true. (Then again, I was sure Full Metal Jacket was an absurd over-the-top caricature, turns out it was actually quite realistic.) I tried asking some friends who took part in joint training exercises; got plenty of stories about how "we're awesome" (it's informative, but doesn't actually tell me anything about the other guys - only that we like to pat ourselves on the shoulder).
(While I'm looking for information already knowing quite a bit, I expect answers would also be helpful to people looking to write about military settings, knowing little about military life at all.)
I am aware of the question Character is an expert on something I'm not. The answer "research, research and more research" is hardly helpful with the question how do I do this research. What resources are available to me, in doing this research? Where do I turn to? "I need to research this" is the premise of this question.