British Army Units, Circa 1940

Armoured regiments or battalions (either armoured cavalry or battalions of the Royal Tank Regiment) had a established strength of 52 tanks. Regiments and battalions were divided into squadrons, batteries (artillery), or companies. These were all units of between 100 and 300 men. An infantry "rifle company had 127 officers and men". A tank squadron had 170 men. A field artillery battery had 267 men. I believe that this is from Colonel Ellis' official history of the war in France and Flanders, although I am just guessing, as I am reading from a photocopy from 20-25 years ago.