Russian troops were in the Crimea back when British redcoats were stationed in New York City, so I don't know exactly when this "seizure" of the Crimea by Russia is supposed to have happened.
Taiwan is Kinmen island, which sits inside the harbor of the city of Xiamen in mainland China. The PRC, the US and the Taipei government all recognize Taiwan and the mainland as the same country. So I don't know how or why "we" would try to stop the Standing Committee from going into Taiwan - the island in their own harbor.
Kind of a laugh to look at the shock of a "payoff' by Russia, when the US is doing bigger payoffs to countries all around the world.