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• Troop Program Units (TPU):
TPUs are the heart and soul of the Army Reserve. These men and women typically train on selected weekends and perform annual training.
• Active Guard Reserve (AGR):
AGR Soldiers serve full-time on Active Duty in units and organizations of the Army Reserve, or that directly support the Army Reserve.
• Individual Mobilization Augmentees (IMA):
The Army Reserve's IMAs are assigned to high-level headquarters where they would serve if mobilized. Most IMAs train annually for two weeks.