1001 Space Earth Nature History First Civilisations Ancient Egypt Biblical Times Ancient Greece Ancient Rome Chinese, Japanese Civilisations Indian Civilisation African Civilisation The Early Americas The Rise of Islam The Middle Ages The Renaissance Civil War and Revolution The Industrial Revolution Two World Wars 20th-century Achievements Human World Science and Technology	When was the atomic bomb dropped? Two atomic bombs, the most deadly weapon yet developed, were dropped on Japan in August 1945, killing thousands of people. This forced Japan to surrender, ending the Second World War.   Previous: Back Book: 1001 Section: History Chapter: Two World Wars