The First World War, then known simply as the Great War, was in Edison's time the deadliest war in human history. The war would be waged between the Allied Powers of the United States, France, the United Kingdom, and Russia against the Central Powers of Germany, the Austrian-Hungary, and the Ottoman Empire. However, the four years of conflict would be made even more horrific by the introduction of mechanized warfare, with new advanced technology as a result of the latest industrial age. New innovations in weaponry such as machine guns, tanks, and airplanes all had the potential to cause horrific losses of life on the battlefield.
World War One was significant for Thomas Edison's life and business even before America's entry into the war in April 1917. Unlike contemporaries such as Henry Ford, who advocated a strict pacifist approach, Edison believed in preparedness, in response to potential threats against the United States. This philosophy advocated arming the United States military for war, with the assumption that America would eventually be forced to enter the conflict. Various prominent individuals during this period, including General Leonard Wood, former U.S. President Theodore Roosevelt , former secretary of war Henry Stimson, and various other prominent politicians and businessmen also advocated this approach, eventually gaining the support of President Woodrow Wilson. Thus, Edison aided the United States military, particularly the Navy, in preparing to defend American shores from enemy attacks, particularly from submarines.
Edison greatly feared the consequences of warfare with modern industrial weapons. As he said in an interview with the New York Times in October 1915,"Science is going to make war a terrible thing –too terrible to contemplate. Pretty soon we can be mowing down men by the thousands or even millions almost by pressing a button."