Pretty much this. The number of countries that could wage a full invasion across an ocean, keeping supply lines open, against a near-peer, is pretty tiny - MAYBE the EU if they all pooled resources (and invited the UK along). MAYBE China if they island-hopped (which is its own set of logistical nightmares). That’s really about it.
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It’s a huge fucking country. The same wisdom of not getting involved in a land war in Asia applies.
Pretty much this. The number of countries that could wage a full invasion across an ocean, keeping supply lines open, against a near-peer, is pretty tiny - MAYBE the EU if they all pooled resources (and invited the UK along). MAYBE China if they island-hopped (which is its own set of logistical nightmares). That’s really about it.