6 oct 1939
Germany invaded Poland on September 1, 1939. This event marked the de-facto beginning of World War II.
After World War 2 Poland became part of the Soviet sphere.
September 1, 1939 in Poland, Nazi Germans attacked
World War 2's official start date in generally recognized as September 1, 1939 - the day the Germans invaded Poland.
Poland
The official start date is 1 September 1939 with the German attack on Poland.
The date has been fixed at September 1st 1939, the day that Germany invaded Poland.
Germany invaded Poland on 1 September 1939, which is the official start date of World War 2, not World War 1
Poland was the first country to be attacked during World War 2. In fact, the Germany invasion of Poland was what CAUSED World War 2.
Poland was invaded by Germany.
In the 1930's, Britain and France had a defence agreement with Poland. On 1 September 1939, German forces attacked Poland so on 3 September 1939, Britain and France declared war on Germany. The German attack on Poland is now accepted as the official start date of World War 2.
World War 2 officially started on 1 September 1939 when German troops invaded Poland. Austria and Czechoslovakia had been annexed by Germany before that date.