Russia and Ukraine

[BrianSoddingBoru4]

It’s partly that, but mostly because the Budapest Memorandum is considered - by people who study this sort of thing - to be treaty-equivalent.

Boru

Which suddenly becomes important, but not so much during the past 7 years, since the invasion of Crimea. Gotcha!

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(Deleted the bits not directed at me.)

Which was a HUGE blunder on the part of the US and others.

But you moved the goalposts. You asked why the US got involved in Ukraine and not other places, not why the US failed in its commitment to Ukraine in 2014.

Boru