In the decade since International Labor and Working-Class History (ILWCH) published its special issue on “Labor and the Military,” treating military service as a problem of labor has grown from a provocation into a major debate. By surveying five recent books on soldiering as a form of labor, this essay poses a set of questions about warfare and work. Is military service best understood as a form of labor, and what might that perspective reveal, or occlude? How do militaries draw the line between those who work and those who fight? Where does that line become blurry? How do soldiers themselves understand the peculiar forms of “work” that war demands? War and work are not separate domains of experience, as these books show. But in some respects, they still demand different tools of analysis.