“Most Americans know roughly as much about the U.S. military as they know about the surface of the moon,” writes Rosa Brooks in her enlightening new book, How Everything Became War and the Military Became Everything: Tales From the Pentagon. I confess: I’m one of those militarily clueless Americans, which is why I committed to reading Brooks’s book. I thought it might fill the gaping holes in my knowledge, as I always found military history too dull and dry to swallow, even in small doses. But the book I approached as a medicinal fix turned out to be a savory treat.