Declarations of war during World War II

Declaration of War during World War II is when a country will formally say that they are going to fight in the war. This is important because it publicly shows that a country is joining the fight, and it also helps them to prepare for war by getting their army, supplies, and resources ready. It also shows other countries who is going to fight in the war. During World War II, many countries including the United States, Japan, Germany, and England declared war on each other. This helped to create the sides of the war, and it began the long and devastating conflict.