Answer
On May 1, 1939, the Sudetenland was formed into the Reichsgau Sudetenland. This was a move by Nazi Germany to incorporate the territory into the Third Reich. The Sudetenland was a region in Czechoslovakia that had a large German population. The Nazis claimed that the Sudetenland was rightfully German territory, and they used the threat of war to force Czechoslovakia to cede the region to Germany.