The regimental depot of a regiment is its home base for recruiting and training. It is also where soldiers and officers awaiting discharge or postings are based and where injured soldiers return to full fitness after discharge from hospital before returning to full duty. Normally, a variety of regimental stores will also be kept at the depot. The regimental depot is not the same as the regimental headquarters, though in practice the two will often be co-located in the same place.

A regiment is a military unit. Its role and size varies markedly, depending on the country, service, or specialisation.