The immense amount of wars during the 20th century caused a drastic change in science and technology for a great deal of positive outcomes, but there were also a fair amount of negative results too. The wars of the 20th century proved to be some of the most gruesome in history. The nations in conflict always tried to get an edge on their opponents, whether through military strategy, or overall manpower. However, as time went on, global leaders started to see how improvements in science and technology could give them drastic advantages to winning on the battlefield.

The most prominent war where technology and science were very important was the second World War. All sides in conflict used their nations leading scientists to give them the edge they needed to win the war. The most known form of this is the invention of the atomic bomb stemming from the Manhattan Project. When the United States heard of their enemies developing nuclear weapons, they immediately relied on the minds of great scientists like Albert Einstein to help them make something that is better than the other side. The sheer power of these weapons was demonstrated during the two bombings on Japan at Nagasaki and Hiroshima. Both left the country in utter dismay and panic. This was a positive for the United States when it came to winning the war. However, the sheer amount of deaths and permanent disfigurements it left on not just Japanese soldier, but civilians as well proved to be the real catastrophe. Einstein even went on to say that his contribution to the development of the atomic bomb was the worst thing he had ever done in his life, and something that he would never be able to forgive himself for. Overall, technology in the war of the 20th century proved to be beneficial for winning, but caused the annihilation of millions of people around the world.