What years did World War II take place?

World War II took place between 1939 and 1945, marking a significant global conflict involving many of the world's nations. This war began with Germany's invasion of Poland in September 1939, leading to Britain and France declaring war on Germany shortly thereafter. The conflict expanded as more countries became involved, either as participants in battles or as affected nations. The war concluded with the unconditional surrender of the Axis powers in 1945, specifically with Germany’s surrender in May and Japan's in September.

The years 1941 to 1945 also represent a part of the conflict, particularly notable for events such as the United States' entry into the war after the attack on Pearl Harbor. However, this timeframe does not encompass the entire duration of World War II. The years 1929 to 1933 refer to the Great Depression, a significant economic downturn that preceded the war, while the years 1950 to 1953 pertain to the Korean War, which occurred after World War II had already concluded. Thus, the correct timeframe for World War II remains firmly established as 1939 to 1945, highlighting its expansive and global nature.