How did we over power the Germany in World War 2?

World War 2 was a battle of the most equipped in the end of the day. From who had the most trained soldiers to the most war ships, or war weapons.  The united states struggled trying to get into the war and took a lot of time properly training their men for battle. Having had much man and women power in the industry of making military and war weapons we were able o have a large supply of back ups with about all weaponry.  But we were also smart, when we noticed while attempting to invade Germany with tiny war crafts where not the best idea, so we created mini bombers that help protect out large air crafts while still fighting off Germany's air force.  World War 2 was truly a battle of the fittest with metal and tactics. In the end of the day our motto of believing that building more crafts that weren't as nice was a greater advantage than only a few high tech ones cause in the end of the day those will eventually give out and you will not have any more back up.