Answer:
World War II began in the 1st of September of 1939.
Explanation:
The WWII began in 1939 when Germany invaded Poland. In a Global context other invasions and conflicts happened previous to the war:
• Italian invasion of Ethiopia (1935)
• Spanish Civil War (1936–1939)
• Japanese invasion of China (1937)
This War was especially difficult for the establishment of Concentration Camps in Russia and Germany and the systematic Jew assassination.