World War II, or the Second World War, was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated, with many engaging in total war on an unprecedented scale. World War II was the deadliest conflict in history, causing the deaths of 60 to 75 million people, a majority of whom were civilians. Millions died as a result of massacres, starvation, disease, and genocides including the Holocaust. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.
World War II: About 3,000 Polish Army troops began a nearly month-long defence of the Hel Peninsula during the German invasion of Poland.
On September 9, in the year 1939, World War II: About 3,000 Polish Army troops began a nearly month-long defence of the Hel Peninsula during the German invasion of Poland. This event is recorded as a Selected Events event in the history of September 9, one of 457 recorded events on this date across all of history.
Key Facts
- This event took place on September 9, 1939 (AD era).
- It is categorised as a Selected Events event in recorded history.
- Referenced in 5 Wikipedia articles.
- Wikipedia source last updated on 23 August 2026.
On This Date in History 457
This article draws on content from Wikipedia, available under CC BY-SA 4.0.
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