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![Organization Structure](/peth04/20041020112459im_/http://www4.army.mil/usar/organization/images/snav_structure.gif) ![Force Composition](/peth04/20041020112459im_/http://www4.army.mil/usar/organization/images/snav_force_on.gif) |
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![Force Composition](/peth04/20041020112459im_/http://www4.army.mil/usar/organization/images/ttl_force.gif)
![Photo of Army vehicles](/peth04/20041020112459im_/http://www4.army.mil/usar/organization/images/img_force.jpg)
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![Skilled, trained and ready to go anywhere and any time.](/peth04/20041020112459im_/http://www4.army.mil/usar/organization/images/sttl_force.gif)
The Army Reserve is comprised of three groups of Soldiers -- the Selected Reserve, the Individual Ready Reserve and the Retired Reserve. In total, there are more than one million Army Reserve Soldiers ready to serve the nation when called upon by the President.
![Selected Reserve](/peth04/20041020112459im_/http://www4.army.mil/usar/organization/images/sttl_selected_reserve.gif)
The Selected Reserve is the most readily available group of Army Reserve Soldiers to the President. The Selected Reserve is comprised of Troop Program Units (TPUs), Active Guard and Reserve (AGR) Soldiers and Individual Mobilization Augmentees (IMAs). In the event of an emergency, all members of the Selected Reserve and up to 30,000 members of the Individual Ready Reserve (IRR) can be mobilized.
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Troop Program Units
The Army Reserve is authorized to have more than 185,000 Soldiers in more than 2,000 TPUs. These men and women typically train on selected weekends and perform annual training.
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Active Guard Reserve
AGR Soldiers serve full-time on Active duty in units and organizations of the Army Reserve or that directly support the Army Reserve.
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Individual Mobilization Augmentees
The Army Reserve's IMAs are assigned to high-level headquarters where they would serve if mobilized. Most IMAs train annually for two weeks. |
![Individual Ready Reserve](/peth04/20041020112459im_/http://www4.army.mil/usar/organization/images/sttl_ind_ready.gif)
Members of the Individual Ready Reserve (IRR) are trained Soldiers who may be called upon, if needed, to replace Soldiers in Active and Reserve units. Many of the Soldiers in the IRR have left Active duty recently and still have a Reserve commitment. Others have chosen to remain Active as Army Reserve Soldiers, but not as a unit member or IMA. In all, there are about 163,000 members of the IRR.
![Retired Reserve](/peth04/20041020112459im_/http://www4.army.mil/usar/organization/images/sttl_retired.gif)
The Retired Reserve consists of approximately 715,000 retirees from the Army (Active Army, Army Reserve and Army National Guard) who remain part of the Army Reserve family.
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