The world never learned from the mistakes of World War 1. Instead, it decided that a new war was in order. 1st of September 1939 sounded like a great day for German forces to invade Poland. And the 3rd of September appeared to be an equally fantastic date for the United Kingdom and France to declare war. Of course, just as in the first Great War, men were seen as disposable items. "The more soldiers we throw at the Germans, the more chances we have of this war being over by Christmas!" the British Commanders exclaimed as they drafted in thousands of teenage boys to fight an adults' battle. After all, if you did not sign up, you were a coward.
On December 7th 1941, the Japanese bombed Pearl Harbour - in retaliation, the Americans joined forces with the other Allies, and swore to fight against the Axis forces. Some troops were sent out to Europe, to the front lines. Some were based in England to aid in protecting Great Britain from German invasion. Their mission was to protect their homeland and their way of life; they would allow nothing to get in their way of their freedom.