[The Fifth Citadel]
Much like the First Citadel, the Fifth had a fortress-like building armed to the teeth with guards patrolling all sides. At the center and six corners stood long poles that looked like radio signal towers, each topped with a ball in the middle.
These orbs were the source of the Citadel's forcefield, each one providing an array of energy that created a barrier deflecting every attack thrown their way.
With the forcefields active, the soldiers stood at the walls peacefully, though their eyes remained fixated on the mercenaries slowly marching towards the Citadel.
The downside of the forcefield was that it didn't provide one hundred percent protection. They only prevented attacks from above and a few inches below the top of the walls. This meant that the entire length of the walls of the Citadel was left vulnerable, completely reliant on their height and thickness.
