U.S. Defense Secretary Ash Carter said the United States will send 217 additional troops to Iraq to serve as advisers and trainers in a Monday announcement.<br />The additional manpower will help with aviation support and force protection.<br />The U.S. also plans on providing Army Apache attack helicopters.<br />There will now be a total of 4,000 troops on the ground in Iraq.<br />Both the troops and the Apaches are expected to be an integral part of the upcoming offensive by Iraqi security forces to retake Mosul, Iraq's second-largest city, from ISIS.