Awakening of the united states-it's about how the united states launched itself to the history of warfare.

AWAKENING OF THE UNITED STATES All throughout the war people haven't heard from U.S. In fact, what U.S. actually did during the war was a big question. Did U.S. just allow a global conflict to happen without helping to settle the disputes? Even before the war began, U.S. had enacted laws designed to prevent American involvement in the war. The U.S. had severely impaired its ability to act against aggression …

…to the finish. Since Germany and Italy were allies of Japan, they declared war on the United States on December 11. The attack marked the entrance of Japan into World War II on the side of Germany and Italy, and the entrance of the United States on the Allied side. This was the very last attack that marked the most drastic change in the course of modern history and worst effect in the history of warfare.