World War II The Largest Conflict in Human History World War II (1939–1945) was the deadliest and most widespread war in history, involving over 100 million people from around the globe. Sparked by Germany’s invasion of Poland, it saw fierce battles across Europe, Africa, and the Pacific. World War II introduced devastating new weapons, including nuclear bombs, and led to the Holocaust, one of history’s darkest atrocities. The conflict ended with the unconditional surrender of Germany and Japan, reshaping world politics and leading to the Cold War. Its impact still influences international relations today. #WorldWarII #WW2 #History #GlobalConflict #MilitaryHistory #TheSecondWorldWar #NeverForget #HistoricalEvents