"In this episode, as with the post-1945 conflicts more classically seen as part of the Cold War, the struggle between the Great Powers was indirect: even in the Korean War (1950–3), there was no declaration of war or full-scale conflict. In 1920, the French provided the Poles with useful supplies and military advice, but there was no commitment of troops. Instead, the Poles benefited from their ability to gain the initiative, and then defeat separately the Soviet forces whose coordination was handicapped by mutually-distrustful Communist generals and by lengthy supply lines. Advancing over a very wide front and reliant on long supply lines, the tired Soviet forces lacked depth and nearby reserves. This was a very different situation to their successful fighting advance across this territory against the Germans in 1944. Prior to the Battle of Warsaw in 1920, Soviet strength seemed particularly potent and threatening, and it was unclear whether it would be possible for the Western powers to stop Soviet expansion short of full-scale war. What containment (to employ a later term) could mean in practice was unclear. In the event, after the battle, the Poles, in turn, advanced to within ninety miles of Kiev, before agreeing an armistice. The eventual Treaty of Riga, in March 1921, left Poland with some territory in modern Lithuania, Ukraine and Belarus, and with a frontier far to the east of modern Poland."