The invasion of Russia in June 1941 created a need for rear-area security units on the Eastern Front and Police Regiment Lublin provided some of these. They were partially replaced by worn-out units returning from Russia. When the regiment was redesignated on 9 July 1942 as the 25th Police Regiment, Police Battalion 65, Police Battalion 67, and Reserve Police Battalion 101 were redesignated as the regiment's first through third battalions, respectively. All of the police regiments were redesignated as SS police units on 24 February 1943.