When did they decide to make the atomic bomb?
Trueman decided to drop the bomb on Japan because if they did an invasion, the United States would lose more men and Trueman did not want to take that chance.
US President Harry S Truman
Well, the official answer to this was that Truman figured, and probably rightly, that the Japanese would defend their homeland to the last living body and take as many America…ns as they could with them. So, if he could get the Japanese to surrender based on the power of the A-Bomb (and he could prevent them from finding out that we actually had no more than the two that were dropped) he could save a lot of American lives.
Actually FDR made the decision to drop the atomic bomb prior to hisdeath, Truman did not even know of the atomic bomb at the time thisdecision was made. When he was informed o…f the atomic bomb afterFDR's death he only decided to continue all of FDR's decisions andpolicies without change. The Army Air Forces implemented FDR'sdecision in an order to drop the bombs "as soon as they becameavailable". Truman's only actual decision on the use of the atomic bomb was to stop dropping them after the Japanese indicated theirwillingness to surrender on August 14. Truman continued his policy against the further use of atomic bombsby firing General MacArthur as soon as he proposed their use duringthe Korean War and replacing him with General Ridgway.
The ultimate decision to use the bomb or not lay with the President of the United States. The bomb was originally built to use on Germany. Once it was defeated they had to con…sider whether or not to use it on Japan to motivate them Japanese leaders to surrender and capitulate to the Potsdam Declaration. Based on all the information provided to President Truman he chose to drop the bombs in the hopes of ending the war and avoid having millions of Japanese and Allied Forces killed in an mainland invasion. He had to weigh the advantage of murdering hundreds of thousand Japanese over the loss of millions people from Japan, the USA, Australia and other countries. He opted for the lesser of two evils. At the time the bombs were dropped they had no guarantee the bombs would even work or motivate the Japanese to surrender. The Allied Forces did not learn until years later that the Japanese were building the atomic bomb and had planned to use it on the United States. So It is likely the decision to drop the bombs prevented the Japanese from using them on the USA.
As a defense against Nazi Germany possibly getting one first. Read the Szilard-Einstein letter to FDR.
The US President Harry Truman.
It depends upon your point of view. Some would argue that he did, in order to save the lives of a million Allied servicemen that would have been lost had mainland Japan been t…aken via conventional invasion. Others would say that he didn't, because of the horrendous nature of nuclear weapons and the untold suffering that was inflicted upon an innocent civilian population.. My own feeling is that he was very wrong to permit the use of the two atomic bombs, because they caused such appalling suffering to the innocent- Japan could simply have been contained within it's own borders after it had been driven out of the nations it was occupying, until there was an internal coup or the economy collapsed. However, it has to be up to you to weigh up the arguments and reach your own decision.
President Harry Truman because he (mainly) wanted to avoid having to spend millions of troops in an invasion of Japan to get them to surrender. He also just wanted to show the… world that we were the best and we intended to make it stay that way and at a forced peace.
Many countries were all trying to build the bomb. The United States managed to become first and prevented the loss of far more lives then had they not been first.
I believe it was the president, Harry S. Truman
In World War 2
In Hiroshima and Nagasaki Atomic Bombings
President Truman got the order to use them against Japan.
In World War 2
Truman. The war needed to be ended ASAP!
In Japan in WW2
Hiroshima and Nagasaki
In US in WW2