The Bombs That Ended WWII

Two Bombs: Little Boy, and Fat Man Ended War Against Japan

Summary of Event

On August 6, 1945, US army flew out to Hiroshima, Japan. They decided to drop Little Boy, killing thousands of people instantly, and a ton of people die later as a result of the bombing. Three days later US army flew out again this time with Fat Man. They reached their destination in Nagasaki, when it was dropped the same impact happened thousand of people were killed, and most were civilians. On September 2, 1945, Japan signed a treaty to surrender ending World War II.


Before all the bombing happen from Little Boy and Fat Man, the United States had to choose two targets. Hiroshima was their first target because of all the industrial factories and headquarter of defense of southern Japan. Nagasaki was chosen because Kokura (the second target) had fog that day.

On August 6, 1945, Little Boy was dropped over Hiroshima killing 80,000 people instantly. The bomb spread 2 miles long burning everything and everyone it touched. 69% of the city was destroyed and 129,020 people lost their lives that day. Three days later on August 9, 1945, the US dropped another bomb named Fat Man on Nagasaki. Again 80,000 people died instantly. People remembered seeing people running from the fire with their skin falling off their face. Fat Man destroyed 70% of industrial factories and killed a total of 246,000 people. On September 2, 1946 Japan signed the treaty that stayed they were not going to be apart of World War 2. The US can defiantly say that they won the war against Japan.


Seventeen-year-old Sumiko Koide was carrying her baby sister through the alley next to her parents house August 6,1945 at 8:15 a.m., the bomb nicknamed Little Boy exploded just less than 2,000 feet above the city of Hiroshima. The Koide family lived about 20 minutes by car from downtown Hiroshima. Destruction was everywhere.

"My father had a greenhouse. All the glass was shattered. Much of it blew into the house," Koide says. Now 77, she lives as Sue Walker with her husband, Glenn Walker. At one point after the blast, she recounts, a roof tile broke loose and hit her on the head, but neither she nor her sister was seriously injured. The bombing and its immediate aftermath left Walker’s memory with terrible images of horror. Three days after the bombing that Walker witnessed, another bomb, nicknamed Fat Man, was exploded over Nagasaki. Though it missed its target by more than a mile, the bomb managed to destroy half the city. When asked how he justifies the bomb Walker replies, "I don’t know. I guess there would have been more people die in an invasion, but not all in one place. It is hard to say that it should have been bombed."

After a moment’s continued reflection, she adds, "We would not have given up, I think, if not for the bombing." She explains that each home had bamboo spears standing inside its front door in case of American invasion. Everyone, children included, had strict instructions from the government not to surrender if Americans came. (Sumiko Koide, bomb survivor, Fat Man and Little Boy bombing)


  • 32 Little Boy bombs were manufactured
  • 120 Fat Man bombs were manufactured
  • Fat Man was supposed to happen August 11th, but the Japanese found out so they moved it up to the 9th.
  • Japan's radar went on an hour earlier before Little Boy was dropped, but they lifted the alarm because there was only 3 planes
  • Little Boy was named after president Roosevelt
  • Fat Man was named after European Prime Minister
  • Tsutomu Yamaguchi is the only person who survived both the bombings
  • Fat Man happened at 11:02
  • Little Boy happened at 8:15
  • Nagasaki wasn't the original target for Fat Man


"Little Boy." - Wikipedia, the Free Encyclopedia. N.p., n.d. Web. 13 Feb. 2016

"Bombing of Hiroshima and Nagasaki." A&E Television Networks, n.d. Web. 13 Feb. 2016.

"Fat Man." - Wikipedia, the Free Encyclopedia. N.p., n.d. Web. 15 Feb. 2016.

Atomic Bombings of Hiroshima and Nagasaki." - Wikipedia, the Free Encyclopedia. N.p., n.d. Web. 15 Feb. 2016.

"Hiroshima and Nagasaki." Hiroshima and Nagasaki. N.p., n.d. Web. 15 Feb. 2016.