The 500-person headquarters of the 1st Infantry Division (‘The Big Red One’) will soon be in Iraq. What does this mean? As of War on the Rocks explains, this is predictable and not indicative of a larger deployment on the horizon. Division headquarters can and do deploy independent of their thousands of accompanying troops. This deployment will also add a critical command and control capability that has so far been filled on an ad hoc basis by U.S. advisers, who—in addition to their full-time job actually advising the Iraqi army—have had to be the main points of contact in managing a giant, growing, multinational coalition. By comparison, a division headquarters is actually optimized for these sorts of tasks.