Fortifications

 are fortified strongholds that are critical to each Alliance in their war efforts as they struggle to conquer and control more territory in Cyrodiil in.

Capture
Attackers must occupy two flagged locations within a keep for a period of time in order to gain control of it. Utilizing siege weapons, every inner and outer wall, and the keep's doors, can be destroyed. NPC guards appear once a keep is claimed, although the damage that the structure has sustained won't be repaired instantly.

Each keep is surround by three resource structures, within 60 seconds of travel time on foot, which control specific upgrades for it. Farms upgrade guards by giving them better abilities, mines upgrade walls, and lumber mills upgrade the keep’s doors. In addition to walls and doors gaining more hit points, there are also some visual upgrades. All of these upgrades occur over time while the same Alliance owns the resources and the keep. There are capture banners at each resource, and resources are captured independently of keeps.

Defense
When a keep is under attack, everyone in the zone will see an icon on the map that indicates the keep's assault status. Keeps in Cyrodiil are linked together in a transit line. If an Alliance holds several linked keeps, its members can fast-travel from one to another, unless that keep is under attack. Masonry and woodworking kits can be purchased to help repair a keep's damaged gates and walls more quickly. Alliance wide bonuses are also awarded for taking and maintaining the territory of keeps, and these are applied in Cyrodiil and Alliance territories outside the province.