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.
The additional manpower will help with aviation support and force protection.
The U.S. also plans on providing Army Apache attack helicopters.
There will now be a total of 4,000 troops on the ground in Iraq.
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.