When did World War I and World War 2 start?

Answer 1

World War 1 began in 1914. The US became a belligerent in 1917. It ended in 1918

World War 2 began in 1939, although some say it began with earlier events such as Japanese invasion of China, the Spanish Civil War or the Italian invasion of Ethiopia. The United States became a belligerent in December 1941 when Japan attached the Philippines and Hawaii, and Germany declared war on the US. It ended in 1945.

Answer 2

world war 1 started in 1914 and world war 2 started in 1941.1939 in Europe and Asia