Modern War #9, Jan-Feb 2014 War by Television: If The US & NATO Had Invaded Serbia is a "what-if" simulation of the fighting that might have occurred across rump-Yugoslavia in the late summer or early autumn of 1999 if the Western alliance had decided on a ground war to settle the Kosovo crisis. WbT is a two-player wargame of low-to-intermediate complexity that posits this might-have-been war lasting about a month, about the maximum time before the.