What would US do if Russia decided to build military bases in Mexico or Cuba?

To make the metaphor correct, what would the US do if Mexico or Cuba asked Russia to build a military base just after the US took some of their territory and Russia continually said no.

Because Russia just took Crimea a few years ago and NATO refused to allow them to join. And Russia has agreed Crimea was part of Ukraine as recently as 1994.

Fair enough. How many bases has the US built in Ukraine anyway?

Ukraine? No idea. Poland, the Baltics, the southern former Soviet republics (most of which end at -stan) to support the invasion of Afghanistan, a lot.

Last time they set up a naval blockade.

The US tried to invade Cuba (with CIA-supported Cuban rebels). It's not a hypothetical.

You'll be happy to learn that you can find that answer in any number of history books.

That's the view from one side of the fence, sorry.

The side of the fence that’s being bombed for no reason. Good luck justifying that.

>no reason

Again. Reason is something one has in this mind. You may find no reason where a different person sees one.

If you can't supply one the logical conclusion is that there is no good reason and all the reasons that flow from simple observation are terribly unsupportable morally and legally. You know that. You are vague because giving a better answer is impossible and the actual answer is unpalatable.

Yet the reason is an important subject, and in questions like that different reasoning lead to lost lives. So it's a serious, justifiable subject to discuss.

I don’t find abstract philosophical arguments convincing.

Everyone bombs everyone, it seems. NATO bombed Serbia, Afghanistan, Iraq,... Sent "peacekeepers" to loads of African countries (funny enough those countries sit on tons of raw materials). Russia bombed Georgia (not the US state of Georgia), Ukraine. China isn't bombing as much with actual bombs for now, money seems to work just fine it seems. Saudi Arabia is bombing Yemen, Israel is bombing Palestine, while Palestine is bombing Israel.

No need to justify any of that, because it all sucks and is ultimately utterly pointless. It does help so, to understand the other side. Because it makes it easier to find a solution that doesn't lead to all out war between nuclear powers. And no, I don't consider just handing Ukraine to Putin to be that solution. Or Taiwan to China, as far as that is concerned.

Differences matter. Details matter. Stop constructing false equivalence.

NATO did not go to war in Iraq as an organization. That was done by an independent coalition. After Saddam's fall, they did however take part in training the new Iraqi military.