أنا عندي بعض معلومات حول قوات إحتياط في الولايات المتحدة يتكون من متطوعين يخدمون بعد التدريب الأساسي في نهيات الأسبوع
Reserve soldiers perform only part-time duties as opposed to full-time (active duty) soldiers, but rotate through mobilizations to full-time duty. When not on active duty, reserve soldiers typically perform training/service one weekend per month, currently referred to as Battle Assembly, and for two continuous weeks at some time during the year referred to as Annual Training (AT). Many reserve soldiers are organized into Army Reserve troop program units (TPU), while others serve in active Army units as Individual Mobilization Augmentees (IMA), or are in non-drilling control groups of the Individual Ready Reserve (IRR). Reserve Soldiers may also serve on active duty in support of the US Army Reserve (USAR) in an Active Guard/Reserve (AGR) status.