Which country did Hitler and Stalin agree to split in half?

Hitler and Stalin agreed to split Poland in half under the Nazi-Soviet Pact of 1939, which led to the coordinated invasion and division of Poland by Germany and the Soviet Union.

Explanation:

Adolf Hitler and Joseph Stalin agreed to split Poland in half under the terms of the Nazi-Soviet Pact, also known as the Non-aggression Pact, signed in August of 1939. This pact was a secret treaty between Nazi Germany and the Soviet Union that arranged for the division of Poland between the two countries and assured that they would not attack each other. This agreement set the stage for World War II, as it allowed for a coordinated invasion of Poland by Germany from the west and the Soviet Union from the east, without the concern of a two-front war for Germany. Stalin also secured Hitler's support for the Soviet occupation of Finland and the Baltic States of Estonia, Latvia, and Lithuania. Despite the agreement, the two leaders maintained mutual distrust, with Hitler fearing communism and Stalin wary of Hitler's fascist regime.