Kingdom of Mercia (Age of Charlemagne) Faction

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Kingdom of Mercia (Age of Charlemagne) Military Tier 9

Defence in Depth

In order to take ground, you must first give it.

Decisive, pitched battles are not always the best option, especially if you are the outnumbered defender. As borders expanded faster than armies could grow, the idea of "preclusive defence" (a line of border forts and outposts to intercept incursions) became more difficult to maintain. "Defence in depth" was a new concept which allowed the enemy to conquer some ground, but spread them out thinly so they could be dealt with more easily. The defenders then closed around and harassed the weaker portions of the invading army, pushing them back to beyond the borders if not destroying them outright. This defensive strategy was further developed during the Middle Ages with the construction of hill forts and concentric castles, which drew the enemy invaders into layers of defences. Methods such as these exacted a heavy toll on attacking forces, as they repeatedly had to run a gauntlet of missile fire whilst scaling the walls.

Effects

Attrition: -30% when under siege (all forces)
Siege holdout time: +1 (double for city-ports) (faction_to_general_own)

Requires
Requires Technologies	Siege Techniques

Enables
Enables Technologies	Siege Stores

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