Strategic Command WWI 1914-1918 The Great War Demo

Multiplayer modes, saving and unit purchases are disabled in the demo but the campaign is playable against the AI as either side.
This 151 MB free demo includes two campaigns, the 1914 Call To Arms grand campaign (playable for the first 3 months from August to the end of October), and the full mini-campaign of 1918 Kaiserschlacht.