They could make more trips
Mechanized Warfare is the one that allowed for the safe transport of American troops to Europe. Merchanized Warfare ii also known as Armoured warfare or tank warfare which is the use of armoured fighting vehicles in mordern warfare. It is used to transport safely the troops of America to Europe.
Yes, it is because they were there and didn't take it from someone else.
America went through a tough time during this age. The government was very corrupt and authority could easily be bribed. This is why court cases against these things could not easily be won, because of the corruption.