Originally posted on callofduty.com:
Train. Train. Train. If you want to be the best, you’ve got to know your stuff – your maps, your equipment, and your abilities. Hesitate and you’re done for.
Welcome to the new Combat Training mode, soldiers. Strengthen your skills in Free-For-All or Team Deathmatch on any multiplayer map against a full set of Practice Dummies. Practice alone or train with other players online. The experience and currency you earn in Combat Training is saved separately from your online multiplayer soldier, but everything you unlock remains within the mode.
Combat Training is a great resource for all player levels.
New players and those typically interested only in single player can jump in to learn the basics of the multiplayer experience and get a feel for different loadouts. Familiarize yourself with the maps and evolve your fighting strategies before joining competitive play.
Veterans can use Combat Training to their advantage, as well. Work out new strategies and fine tune loadouts without affecting your kills/death ratio. Nail down formations and team chemistry with your clan, and choose the maps you need to work on to get a better sense of spawn points and player flow.
This looks like it will help out noobs get into the multiplayer scene easier than ever. We're always in need of more noobs to own. Looking forward to this game!