The korean war a. involved large numbers of chinese troops after united nations air forces bombed manchuria. b. began only five months after the soviet and american governments had established a new, unified government there and withdrawn their armies of occupation. c. was caused by domestic disagreements between korean factions in the south. d. was finally won when 250,000 american troops captured the north korean capital after a four month siege. e. was fought by a united nations force composed mainly of south korean and united states troops against north korean forces and, after late 1950, chinese "volunteers."