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. Nazi Germany possessed overwhelming military superiority over Poland.

Detailed explanation-2: -The Battle of Westerplatte was the first battle of the German invasion of Poland, marking the start of World War II in Europe. It occurred on the Westerplatte peninsula in the harbour of the Free City of Danzig (now Gdańsk, Poland).

Detailed explanation-3: -On 3 September 1939, France declared war on Germany following the German invasion of Poland. In early September 1939, France began the limited Saar Offensive but by mid-October had withdrawn to their start lines.

Detailed explanation-4: -The invasion is also known in Poland as the September campaign (Polish: kampania wrześniowa) or 1939 defensive war (Polish: wojna obronna 1939 roku) and known in Germany as the Poland campaign (German: Überfall auf Polen, Polenfeldzug).

Detailed explanation-5: -Poland, 1939 Although journalists popularized the term blitzkrieg during the September 1939 invasion of Poland, historians Matthew Cooper and J. P. Harris have written that German operations during this campaign were consistent with traditional methods.