[redgolum]

And what do we do when Russia starts supplying arms to insurgents here?

This is right next door to them, in a place that has been Russian far, far, longer than it was Ukrainian.

[AmericanExceptionalist]

And what do we do when Russia starts supplying arms to insurgents here?

I was not aware that either (a) there is a large-scale insurgency going on in the US (or one that is about to occur); or (b) those who would fight to hold onto that which is rightfully theirs (not Russia's) might be described as "insurgents."

This is right next door to them, in a place that has been Russian far, far, longer than it was Ukrainian.

But it is now a part of Ukraine. (At least, it was before Vladimir Putin decided to annex it.)