Answer:
Invasion of Poland
Explanation:
Some people are unaware that Hitler had no desire to provoke a world war.
In exchange for Danzig and the Polish Corridor, Hitler suggested an alliance with Poland in 1938. Also, Hitler needed Poland to transport his soldiers through on their way to invade the Soviet Union. Because Poland's foreign minister rejected the idea, Hitler attacked Poland on September 1, 1939.
On the 3rd, the United Kingdom and France declared war on Germany.
