Are Americans an especially warlike breed?

So, America's history has made Americans an especially warlike people? Hmmm . . .

the large immigration to British North America from the English-Scotch border area, and the subsequent endemic and brutal warfare against the North American Indians, created a political culture in the United States in which failures to respond violently to challenges were seen as the mark of weakness that would lead to predation against the weakling, and in which willingness to fight was part of the duties of a citizen. We are a warlike people. We fought in Iraq because we rise, violently, to violent challenges, and we will remain a warlike people for the foreseeable future.