The "breakup of socialist multinational solidarity" only happened because the USSR occupied so many nations at the end of WWII and forced them to belong to the Warsaw Pact. Any attempt to move away from the Kremlin was met with an invasion....Budapest, Prague, Warsaw, Kabul....Seriously? How could the U.S. benefit from a proxy war among factions tied to France and Russia, Germany, and Britain, that was both a symptom of and a precipitating factor in the breakup of socialist multinational solidarity, and that distracted the world’s attention from Russia’s bloodier war in Chechnya that the U.S. supported?
Solidarity was a myth and the US gained nothing at all by suppressing the Serbian onslaught.