U.S. Marines with the Individual Mobilization Augmentee reserves, participate in their annual training as part of the Marine for Life Network on Marine Corps Base Quantico, Virginia, June 7, 2023. IMA reserve Marines come together once a year to complete the required training and be reserve ready. - U.S. Marines with the Individual Mobilization Augmentee reserves, participate in their annual training as part of the Marine for Life Network on Marine Corps Base Quantico, Virginia, June 7, 2023. IMA reserve Marines come together once a year to complete the required training and be reserve ready.