Nor did millions of Koreans, Vietnamese, Iraqis, Afghanis and so on.
Millions of Ukrainians did not sign up for it.
In fact: almost nobody except for the aggressors signed up for a war and even there that's debatable, usually it's only a few people at the top and then 100's of enablers and thousands to millions of conscripts, who didn't sign up for it either.
But that doesn't mean that you won't end up in a war. The question is how much control you will have over the location of the battlefield. That's why the Americans had this 'fight them over there rather than here' doctrine going. Which given their lack of proximity always was a bit of misdirection, but that doesn't mean that the idea by itself does not have merit.
