Hitler and Emperor Hirohito would have eaten our lunch, taken our milk money, and stolen our Halloween candy! They almost did. But back then we allowed our troops to fight and kill the enemy. America's strategy actually included propaganda from our media. Hell, nowadays the weak Europeans aren't allowed to draw a cartoon about Islam, let alone create a SOUTH PARK episode including the Prophet Muhammad!
I propose that what made America great was an abundance of natural resources and an incompetent government (by design) that took a few hundred years before it could manage to wedge itself in between competent people exploiting those resources. Now that government is firmly wedged in, the run is over.
For anyone not familiar with the Oath Keepers, there are various "meetup" groups around the country (e.g., http://www.meetup.com/New-York-City-Oath-Keepers/ or http://www.meetup.com/HudsonValleyNY-OathKeepers/) to help educate those with a license to kill American citizens (i.e., military, law enforcement, etc.) about the oath they took to uphold the Constitution—and the priority that oath has over direct orders from superiors.