2-24. The Army provides combat ready forces on short notice to combatant commanders. Units transition from training locations to operational theaters using the train-alert-deploy sequence. Commanders recognize that crises rarely allow sufficient time to correct training deficiencies between alert and deployment. They strive to ensure their units are prepared to accomplish their METL tasks before alert and refine mission specific training in the time available afterwards. Accordingly, applying the principles of training, a commander conducts training to sustain proficiency on METL tasks within the Band of Excellence to ensure mission readiness. Mission specific training can be conducted as organizations are alerted and deployed based on time available.