Battle ideas Fortification battles (castles, forts) Any decent fortification is difficult to build, but confers high defence bonuses. The defence factor given as in Lord of the Realms II is probably the most appropriate. Defending units should be able to get onto the walls easily, and defend with high bonuses to attack and defend. Designing and buildign of fortifications should be automated, but the player should also be able to take over if he/she decides to.