From General Dan McNeil, former Army Forces Command (FORSCOM) Commander: Within the Army Forces Generation (ARFORGEN) model, brigade combat teams (BCTs) would move through a series of three force pools; they would enter the model at its inception, the "reset force pool", upon completion of a deployment cycle. There they would re-equip and reman while executing all individual predeployment training requirements, attaining readiness as quickly as possible. Reset or "R" day, recommended by FORSCOM and approved by Headquarters, Department of the Army, would be marked by BCT changes of command, preceded or followed closely by other key leadership transitions. While in the reset pool, formations would be remanned, reaching 100% of mission required strength by the end of the phase, while also reorganizing and fielding new equipment, if appropriate. In addition, it is there that units would be confirmed against future missions, either as deployment expeditionary forces (DEFs-BCTs trained for known operational requirements), ready expeditionary forces (REFs-BCTs that form the pool of available forces for short-notice missions) or contingency expeditionary forces (CEFs-BCTs earmarked for contingency operations).