Regiment

[Mobhack]

A commonwealth regiment could be one batallion or maybe 3 - depending on recruitment in its cachement area. Plus as well as regular bns, there were sometimes Territorial bns of weekend volunteers.

In the 2 world wars, then there were 1st, 2nd, 3rd etc regiments of say the Black Watch created - each regiment being around 3 bns. Shrunk back to the original size post war.

But the individual batallion is what was deployed - not the entire regiment, unlike the Continentals.