Both the First World War and the Second World War mark the history of the world as they show similar implications or effects in the world. The World War I also called the Great War was fought between 1914 and 1918 and involved most of the global great powers which assembled in two opposing sides. Basically, approximately 70 million soldiers were mobilized to fight hence the WWI became among the largest wars globally. During the war, more than 9 million soldiers were killed mainly because of advancement in technology of their opponents. The World War II on the other hand was fought between 1939 and 1945 and it also involved great powers in the whole world. These great powers formed two opposing sides. Ideally, the World War II was more widespread than the WWI because of a number of reasons one being advancement in weapon technology. More than 100 million soldiers were involved in the war. Like it is usually the case of any war, the opposing or fight great powers put their economic, scientific and industrial capabilities at the verge of serving the war. During this war there was use of nuclear weapon in Japan whose effects have been felt for a long period of time.