In America you could ba any age to fly a plane but you had to be atleast 18 to join the army some 16 year olds lied about their age to get to fly a plane.
Less than 200 mph.
There are a lot, but these could work: The Industrial Revolution, World War I and World War II. You could also argue that America's status as a world power was evidenced when America's great depression caused a world wide depression.
America minding there own business
America didn't fight in world war 1
it could be the tank or airplane. Probably the plane
america entered the war after pearl harbor
The lightest palne was a dog plane
To try and force the Japanese emperor to surrender so that the second horrid world war could come to an end.
The Japanese believed that they could beat America. They were wrong.
The Ones In World War 1
Me 262