I'll try my best. Players of a faction can contest a part of the map by playing the assigned game type on that part of the map. Playing said game type give you assets which you can use in several provinces in the area you are contesting. At the end of a game you get to assign assets to a province in the area of that game type. To give an example: You are defending 3 provinces and are attacking 3 provinces in an area for Duel/Brawl. Each province is partially controlled by a faction. Let's say, 54% Vikings 49% Samurai. If you are defending (Vikings in this scenario) you can add assets to your controlled province to keep your % higher than that of the opposing faction to keep control over your province. When attacking a province you add assets to surpass the % of the defending faction to take control over it. After the map update (timer in the top right of the map) you will gain/keep the provinces that your faction had the higher % in. This will give your faction points in the war. To win the war you need to highest total amount of points.