On September 27 of Year 20, Napoleon / Hitler convened an international conference in Germany . . .
Where by the pen he acquired territory in Eastern Europe and set the stage for his invasion of the Russian empire. On September 27 of 1808, Napoleon convened the Conference of Erfurt in Germany with Czar Alexander I to clarify the Franco-Russian alliance.
While Napoleon did succeed in his diplomatic effort to acquire territory in Austria, he failed in his primary objective of cementing Russia's loyalty to his Continental System and so paved the way for his punitive invasion of the Russian empire. On September 27, 1938, Hitler began the Munich Conference when Britain's Prime Minister Neville Chamberlain intervened in the Czecho-German crisis to accede generously to Hitler's territorial demands in Czechoslovakia, a diplomatic preamble that was formalized when the conference was formally convened two days later.