What does “Confined to Barracks” (CB) mean?
It is a military punishment (see above). It is a lot more than just being allowed to swan around the barracks doing nothing. On the hour, every hour from 0600 (6am) until 2200 (10pm) you have to report to the RSM in full kit. Usually he will use you to help train young NCOs or junior Officers on parade ground drill. By that I mean the soldier/s on CB will be the squad given orders by the trainee. It is hot, tiring and boring. It is to be avoided if at all possible. In WW1 the varying types of field punishment were No1 and No 2. 1 was the more serious. No 1 involved being attached to a fixed object that was in sight of the enemy. No 2 involved extra duties, loss of pay and sometimes loss of any temporary rank you held.