On August 6, 1945, the United States dropped an atomic bomb, nicknamed "Little Boy," on the Japanese city of Hiroshima. This event marked the first use of a nuclear weapon in warfare. The bombing resulted in widespread devastation and loss of life, with an estimated 120,000 people killed within the first four days. The attack on Hiroshima, along with the subsequent bombing of Nagasaki three days later, ultimately led to Japan's surrender and the end of World War II. Here's a more detailed breakdown: Date: August 6, 1945. Location: Hiroshima, Japan. Weapon: "Little Boy," a gun-type atomic bomb using Uranium-235. Delivery: Dropped from the B-29 bomber Enola Gay. Casualties: Estimated 120,000 deaths within the first four days, with many more succumbing to injuries and radiation poisoning in the following months and years. Impact: The bombing resulted in the destruction of approximately 5 square miles of the city center. Significance: This was the first and only use of atomic weapons in wartime.