Medium troops are level 4 warriors, and probably make up the bulk of your standing army. They are professional soldiers, who have served their time as light troops and then undertaken extra training. They expect only to be used in times of war or civil insurrection, and don’t do basic patrols or civic policing. They are a 1bp upgrade from Light Troops.
All medium troops are built with the Medium Troops Template, and are a 1bp upgrade from Light Troops.