A former first-string tackle considers the green zone as a war zone:

Just as football has evolved in accordance with the evolving business ethic of American society, so has it evolved in accordance with the changing strategic assumptions about war. The development (or rebirth) of the T-formation in football coincided almost exactly with the development of a new era of mobility and speed in warfare best exemplified in the Blitzkrieg tactics of the German armies in Europe in 1939-40. The T-formation soon overwhelmed the “Maginot Line” mentality of traditional football, based as it was on rigid lines and massive concentrations of defensive and offensive power.