What about an extended WWII in which the United Kingdom falls before the might of the Third Reich?
Or a conventional WWIII, in which the USSR launch an attack on Europe, the Far East, the West Coast of North America?
Or can it be done after 1990 at all? Let's say the collapse of the USSR isn't as peaceful as in OTL, and the new radical Russia under is much more militaristic and agressive the old Soviet Union.