The 1st Infantry Division headquarters will deploy to Iraq soon as the U.S. military steps up its campaign against Islamic State militants, the Pentagon said Thursday. It will be the first division headquarters assigned to Iraq since U.S. forces withdrew from the country at the end of 2011. About 500 soldiers from the Fort Riley, Kan.-based division will be heading for the Middle East next month with about 200 of them going to Iraq, Pentagon press secretary Rear Adm. John Kirby said. “They’re going to provide command and control of the ongoing advise-and-assist effort in support of Iraqi and peshmerga...