In Edain Mod, there are many unique outposts that offer entire new playstyles and strategies. Some outposts are large and imposing, like Minas Morgul, while others start out small but can be expanded to be a force to reckon with, like the Dunedain Outpost. Each faction's unique outpost can train units and heroes, research special upgrades, produce extra resources, and/or just be a pain in the side of the enemy.
The alternative to the unique outposts is a generic outpost (for all factions except Lothlorien). These provide a citadel and 3 build plots to expand your forces or defend your land.