I put this under Canadian politics because we often hear about the size of the Canadian Forces. Canada does appear only briefly on this timeline, between 1943-45. The video shows over time the troop size of all military forces under national command (see the description, the title on the video is not very detailed), it does not include reserve forces. What is very interesting is correlating these with world events; perhaps someone should do a more detailed video but that would need to be much longer to give enough time to absorb so much.