The Non-Permanent Active Militia (NPAM) was the name of Canada's part-time volunteer military force from the time of to 1940. The NPAM (also called "the Militia" though that term could also encompass the full-time standing army known as the Permanent Active Militia (PAM)) was composed of several dozen infantry battalions (redesignated as regiments in 1900) and cavalry regiments. With the withdrawal of the British forces in Canada after the turn of the 20th Century, supporting corps were created in Canada as part of both the PAM and the NPAM.