It's not the same France, but 1938 France, along with England came to the Munich Agreement with Italy and Germany to let Germany annex part of Czechoslovakia, d

It's not the same France, but 1938 France, along with England came to the Munich Agreement with Italy and Germany to let Germany annex part of Czechoslovakia, despite France and Czechoslovakia having a mutual assistance pact. Ukraine's Budapest Memorandum on Security Assurances doesn't seem to have gotten them much in the way of territorial integrity either. If I were bordering Russia or any other state that seems interested in expanding its borders, I'd be concerned that international agreements might not deter such expansion and wonder what could be done. Obtaining the means for MAD seems reasonable, although the costs are high and perhaps unjustifiable.