The US has done that numerous times to other nations....promising support and aid if they take action....then abandoning them at the most critical time.
Hungary, Czech, Cuba are just a few examples.
Which is why I wrote “outside powers” and not Russian.
I know we (the US) has done the same thing and I wish we did not. It never seems to work out. I am all for ending all foreign aid. Relations between nations should be based on mutual self interest.