The advance notice also provides a greater measure of predictability for family members and flexibility for employers to plan for military service of their employees. The final determination of whether these units will deploy will be made based on conditions on the ground in Iraq.
According to the Department of Defense, this alert is not associated with the current troop surge. The units would deploy as replacement forces for formations currently operating in Iraq. Two other units have also been placed on alert, and there are approximately 13,000 personnel in these four brigades.