12022-01-27T23:31:32+00:00Jessica Bocinskia602570e86f7a6936e40ab07e0fddca6eccf4e9b1561World War II began in Europe on September 1, 1939, when Germany invaded Poland. Great Britain and France responded by declaring war on Germany on September 3.plain2022-01-27T23:31:32+00:00September 1, 1939Jessica Bocinskia602570e86f7a6936e40ab07e0fddca6eccf4e9b