WORLD HISTORY

Detailed explanation-1: -German troops invaded Poland on September 1, 1939, triggering World War II. In response to German aggression, Great Britain and France declared war on Nazi Germany.

Detailed explanation-2: -World War II, which began in 1939 and ended in 1945, was the deadliest and most destructive war in history. Before the war, Germany, America, and the rest of the world were going through the Great Depression.

Detailed explanation-3: -In World War Two, the Polish armed forces were the fourth largest Allied forces in Europe, after those of the Soviet Union, United States, and Britain. Poles made substantial contributions to the Allied effort throughout the war, fighting on land, sea, and in the air.

Detailed explanation-4: -Granted, Germany’s invasion of Poland in 1939 triggered declarations of war from France and the United Kingdom, formally starting World War II.