Why The Manhattan Project And The Bombs Dropped On Japan

The Manhattan Project was the American program for researching and developing the first atomic bombs. The weapons produced were based solely upon the principles of nuclear fission of uranium 235 and plutonium 239, The project as a whole cost approximately 2 billion dollars of taxpayer’s money and employed over 120,000 people . It was a massive undertaking to say the least. A project of this size needed justification and it seemingly came in the form of attacking the Japanese . The President's chief of staff Admiral Leahy The democrats would have suffered a political death blow if they were not able to justify the investment.

This committee decided that the United States should retain nuclear superiority, in the event that international relations deteriorated following World War II (US Department of Energy). This decision is a foreshadowing of the Cold War, and nuclear arms race which followed the dropping of nuclear weapons on Japan. The interim committee also decreed that a regulatory system should be created to control the development of nuclear weapons, since other nations would inevitably obtain the technology needed to develop weapons. Possibly, the most influential decision made by the interim committee was to keep the details of the atomic bomb a secret, to maintain the shock effect, until after it had been dropped on Japan. Two atomic bombs were dropped on the Japanese cities of Hiroshima and Nagasaki. The first bomb dropped was a uranium bomb, nick-named Little Boy, was untested before its detonation (US Department of Energy). The second, dropped after the Japanese did not surrender, was a plutonium bomb, nick-named Fat Man. The dropping of these bombs propelled the United States to a seat of world power, as they were the only country to obtain a weapon of mass destruction. The Manhattan Project became scientific and engineering feat, employing over 100,000 individuals. The exceptional organizational model the Manhattan Project provided, allowed for great scientific achievements in the later part of

One of the most controversial and heavily scrutinized issue of the twentieth century was President Harry S. Truman’s decision to unleash atomic bombs on Hiroshima and Nagasaki in 1945. The motives behind Truman’s actions are shrouded in controversy as top military officials publicly denounced the use of such a disastrous weapon. There is overwhelming evidence supporting both sides of the decision, as historians are split in opinion. The United States had been using conventional bombing to try to push Japan over the edge to surrender, but with countless Japanese civilians loyal to their country, invading Japan proved to be more problematic than first thought. Harry S. Truman made the ultimate decision of dropping the atomic bomb in hopes that it would end the war, but the amount of casualties caused by it has historians questioning if it was morally right, “The bomb was unfortunate, but it was the only means to bring Japan to a surrender,” historian Sadao Asada states (Bomb 9). Truman’s decision to drop the atomic bomb on Hiroshima and Nagasaki were justifiable because they would ultimately lead to the end of the war and would demonstrate U.S. supremacy.

It became known that the German knew how to create an atomic bomb and FDR created a committee to study and create atomic bombs, named the Manhattan Project.The Manhattan Project was significant to the war because it led to the end of World War II and caused the Japanese to surrender to the Americans. The amount of people working together along with the cost and time which led to advancements in technology that was far ahead of any enemy. The creation of the bombs delivered a push in the advancement of science, innovation, designing, military and the entire of society into another age. It drew out the powerhouse that we consider today to be the United States of

“We believe that . . . an early unannounced attack against Japan inadvisable. If the United States were to be the first to release this new means of indiscriminate destruction upon mankind, she would sacrifice public support throughout the world, precipitate the race for armaments, and prejudice the possibility of reaching an international agreement on the future control of such weapons. Much more favorable conditions could be created if nuclear bombs were first revealed to the world by a demonstration in an appropriately selected uninhabited area.” The initial test for the atomic bomb was dropped in Alamogordo, Mexico with experts observing more than 20 miles away. The explosion was estimated to be a blast of about 10,000 tons of TNT. The Atomic bomb’s intense and destructive power frightened many scientists who were working on the Manhattan Project (Knebel 78). Including the father of the atomic bomb, J. Robert Oppenheimer. Oppenheimer felt as if he had created something that would bring forth destruction to the world, instead of using his brilliant scientific mind to improve and usher the world into an era of peace like he intended to. In fact, many scientists within the Manhattan Project were shocked and against using such a powerful weapon as the atomic bomb against other humans, so much that a group of scientists and

Leading up to this time the fascist dictators began to gain power in European countries. The big three being the countries of Nazi Germany, Adolf Hitler, Italy, Benito Mussolini, and Japan, Emperor Hirohito. In 1935 Italy invades and conquers Ethiopia, shorty after Nazi Germany and Fascist Italy sign a treaty of cooperation. In 1937,Japan, lead by Hirohito, invaded China. Joseph Stalin, of Russia, signs the German-Russian non-aggression pact; which allowed Hitler to invade Poland. But when news of the German invasion of Poland spread Britain along with France joined the war to oppose the Germans. Germany only continues in it’s quest for conquest by invading Denmark and Norway in the year 1940. Meanwhile the United States is remaining completely uninvolved under it’s Neutrality Act that was passed in 1935. The United States, lead by president Franklin D. Roosevelt, enacted it’s Lend Lease Act in 1941 in order to trade and sell to allied forces, for payment after war. Japan realizes that the U.S. wasn’t exactly being neutral so it sent suicide bombers to attack our naval base in Pearl Harbor on December 7, 1941. Thus leading into the use of the atomic bomb, but first the construction, an event referred to as the Manhattan Project. The name Manhattan Project came about because the program began under the Manhattan Engineering District of the War Department.

As president Harry S. Truman states in his speech, “With this bomb we have now added a new and revolutionary increase in destruction to supplement the growing power of our armed forces… We are now prepared to obliterate more rapidly and completely every productive enterprise the Japanese have above ground in any city” (Document D). This newly attained bomb would not only add to America’s destructive firepower, it would also have the power to end the war. It would ultimately destroy Japan and its ability to continue fighting the war against the Allied

“ The atom bomb was no ‘great decision.’ It was merely another powerful weapon in the arsenal of righteousness.” This quote was said by Harry S. Truman the first President who used an atomic bomb. The program that was able to create this monstrous power was known as the Manhattan Project. Creating this weapon was their main priority. The United States was in the midst of World War 2. The atomic bomb is considered to be the main factor that ended that war. It was a race against the multiple enemies of the United States, to be the first to acquire this power and use it when necessary. The Manhattan Project was kept strictly confidential and, created the foundation of the future and more powerful nuclear weapons to come.

     When the first atomic bomb was detonated in Alamogordo New Mexico on June 16, 1945, all the scientists involved in the Manhattan Project understood the great destructive power of radio-active isotopes. Although the atomic bomb was a very destructive force our world would not be as good without it. Because of the government funding involved in the project coupled with the need for an atom bomb, much research that otherwise may not have occurred took place in the US. The Manhattan project opened the door to nuclear advancements and applications.

1942: The Manhattan Project: The Manhattan Project was a military project that created the Unites States’ first atomic bomb. The project that was researched, put together, and tested was used as a threat to Japan so that they would surrender. The Japanese military refused to surrender

The Atomic Bomb or known Atom Bomb was created by a scientist, which assembled the first bomb. He and General Leslie Graves officially and successfully tested it in New Mexico, July 21, 1945. Despite this, two refugees from Italy and Germany in the early 1940’s, Enrico Fermi and Leo Szilard were the first to ever produce a controlled chain reaction. The bomb was created to use during WW2 and end it. This was big for America as president Franklin was notified that Germany was working on a similar weapon to use on America and its Allies. This bomb was needed to win the war and it took approximately 160,000 lives as a result while also having many affects on the people then, the people today, and the environment (Henretta, Edwards, & Self, 2012). The US was the first and only country to this day to drop an atomic bomb on another country, not once, but twice. This did end the war; however, the results were quite devastating to Japan. The environment and lives lost were all greatly impacted however, the world as a whole would be impacted for years to come. It also had its political reasoning behind it to show the global power of America. The devastation caused by the bombs also created deterrence from using them in the future at the time. Furthermore, now as other countries have improved technological

World War II began September 1, 1939 and ended September 2, 1945. When this war began, many young boys and men were drafted into the war. Most of them left what they were doing and all they’ve known, to fight in the war. It was the war that advanced technology and created social changes. The United States was the first country to use the atomic bomb in warfare. On August 6, 1945, the first of two atomic bombs were dropped. The first bomb was named, “Little Boy,” and was dropped on the city of Hiroshima. The second bomb was named, “Fat Man,” (History.com Staff 2009) and was dropped on the city of Nagasaki three days later. The bombs resulted in thousands of casualties and radiation among the civilians. Dropping the atomic bomb was the right decision because the bomb would end the war, it was revenge for Pearl Harbor, and it saved the lives of more Americans.

Finally, the bombing of Hiroshima and Nagasaki was unjustified because of the lack of testing. Although the project to design the first atomic bomb, codenamed the Manhattan Project, began in 1941, the first bomb was not ready to be tested until the month before it would be used in 1945. When it was tested at Trinity Site in New Mexico, the detonation caused unexpected results (“The Manhattan Project”). It caused “A blinding flash visible for 200 miles lit up the morning sky. A mushroom cloud reached 40,000 feet, blowing out windows of civilian homes up to 100 miles away. When the cloud returned to earth it created a half-mile wide crater metamorphosing sand into glass” (“The

Why is this so important? It’s important, because it not only led to the end of the war between Japan and the U.S., but it was also the beginning of the nuclear age. The first two nuclear bombs came from this project: Fat Man and Little Boy. The war between Japan and the U.S.

The US opened the nuclear world race when it started the Manhattan project to acquire a nuclear bomb. The Manhattan Project was established in 1942 as a secret project to build and produce a nuclear bomb in the US. The US succeeded building the first American nuclear bomb in 1945. Unfortunately, the US used the nuclear bomb against Japan. Hiroshima and Nagasaki were attacked by nuclear bombs and