In 1920, the evacuation of Semyon Budionny's famous Cossack 1st Cavalry Army from the Ukrainian front on this day enabled the Commander of White Forces, Józef Pilsudski (pictuerd) to proclaim a new Confederation comprising Poland, Ukraine and the Baltic States.
Triumph at KievIn a broader sense, this incredible feat of arms prevented the Soviets from wrecking the Treaty of Versailles, a peace settlement from which the Russians were excluded. Which wasn't to say that the French were similarly excluded in the Ukraine, because Captain Charles de Gaulle led a military mission to advise the White Polish Forces on the Ukrainian Front. And yet the decisive contribution was from the Polish Cipher Division, who, in anticipating an assault on the southern front, had saved the day.
Lenin's dreams of building Marxist States in Poland and Germany had been shattered. And yet the establishment of a buffer state in eastern europe would have long term consequences for both the security of the region, and also the future of the Soviet Union itself. Maybe, just maybe, the system of security proposed by Treaty of Versailles would survive.