USA HISTORY

Detailed explanation-1: -September 1, 1939 Germany invades Poland, initiating World War II in Europe. September 3, 1939 Honoring their guarantee of Poland’s borders, Great Britain and France declare war on Germany.

Detailed explanation-2: -Outbreak of World War II (1939) On September 1, 1939, Hitler invaded Poland from the west; two days later, France and Britain declared war on Germany, beginning World War II. On September 17, Soviet troops invaded Poland from the east.

Detailed explanation-3: -The Second World War was the most destructive conflict in human history. Years of international tension and aggressive expansion by Fascist Italy and Nazi Germany culminated in the German invasion of Poland on 1 September 1939. Britain and France declared war on Germany two days later.

Detailed explanation-4: -When did World War II start? Ans. World War II began in Europe on September 1, 1939, when Germany invaded Poland.

Detailed explanation-5: -Granted, Germany’s invasion of Poland in 1939 triggered declarations of war from France and the United Kingdom, formally starting World War II. But that event was only the final straw in a series of events. Various other economic and political challenges had been building up tension for years.