Complex sentence: The player is put into the role of the Battlefield Commander for the British Expeditionary Forces in Western Europe during 1914 against the German Army, or vise versa, and the player must accomplish a set of missions to complete the game during the campaign.
Split into simpler sentences: The player is put into the role of the Battlefield Commander for the British Expeditionary Forces in Western Europe during 1914. The antagonist of the game is the German Army and the player must accomplish a set of missions to complete the game during the campaign.