Bing found these results
1939 - Wikipedia
Timeline of World War II (1939) - Wikipedia
World War II | Facts, Summary, History, Dates, Combatants,
World War II: Summary, Combatants & Facts | HISTORY
1939년 - 나무위키
Historical Events in 1939 - On This Day
World War II Timeline From 1939 to 1945 - ThoughtCo
Invasion of Poland, Fall 1939 | Holocaust Encyclopedia
Invasion of Poland (1939) | Description & Facts | Britannica
1939년 - 위키백과, 우리 모두의 백과사전