Reserve components and Individual Ready Reserve. Reading through details now. Could be training or to augment currrent units. IRR soliders are those that have usually fulfilled their commitment and are individually part of ther reserve component, basically on standby usually if shit hits the fan and they need you as you are not part of a unit. Somewhat of an odd move for a traning operation. Who knows these days as we are short manned. Readin up on details. Might not be a big deal but, would suck if you are on IRR and they call your ass back for that crap.