"Just fill in the blank for 'group', General-"

In a long consideration of the DADT repeal debate past and yet to come, Tobin Harnshaw muses:

A more pertinent question might be whether such an experiment is worth undertaking. How much credence, for example, would one give to a military man who concludes that using the Army in “experiments to solve social problems would be fraught with danger to efficiency, discipline, and morale.” What if I told you the quote comes from a memo written by Army Secretary George C. Marshall in the later years of World War II? Times have changed. To what extent has military culture?