 The latter battalion had been transferred to Police Regiment Lublin before the other five battalions were formally assigned to the regiment in mid-December.By early 1940 the regiment had only four battalions under command and it remained that size until around September 1940 when another battalion was transferred elsewhere, although the individual battalions assigned periodically changed.The invasion of Russia in June 1941 created a need for rear-area security units on the Eastern Front and Police Regiment Warsaw provided some of these.