Battlements



Fire Nation battlements are tower-like structures, which house Firebenders and crossbow weapons. There are usually at least two soldiers per battlement. The crossbows would fire spears, attached to chains. If they hit a boat, they would draw the chain to pull the vehicle right out of the water, making it vulnerable to attack by soldiers. However, the chains proved relatively weak, as Katara cut one of them with just one swipe of water.

The battlements flanked the one pathway leading from the beach to the Fire Nation capital and the pathway that led to the actual city. Some of these structures were supported by triangular platforms, while others rested on unpaved cliffs. Despite being the same structure, they appear to come in different sizes.

History
When the submarines of the invasion force entered the low, clear waters of the entrance to the bay of the Fire Nation capital, they were easily discovered by the guards who sounded the alarm. As a means of defense, the guards shot giant harpoons at the intruding vehicles from their battlements. One of these harpoons pierced one of the submarines and started to hoist it out of the water. Before the submarine could be totally exposed to the attacks of the defenders, Katara intervened by cutting the chain with her Waterbending.

After the troops arrived on the beach, the soldiers manning the battlements started to bombard the invaders with bombs shot from the battlements in an attempt to repel them. The invaders struck back, however, with stones that they'd brought with them on supply trucks. Toph, The Boulder and The Big Bad Hippo took down the first battlement by Earthbending the stones at the battlement, rendering it unusable. Huu, fighting as the "swamp monster", took down another battlement by throwing one of the Fire Nation's tanks atop of the structure, causing it to explode.



The projectiles fired from the battlements proved to be the biggest problem for the invasion force as the bombs managed to cause a lot of damage to the tanks, the supply trucks carrying stones and even the swamp monster's left arm got blown off by a projectile from these battlements. Realizing that their only chance of a successful invasion was to take down the battlements, Hakoda, Sokka and Katara boarded Appa and prepared for an aerial attack. As they flew past the first battlement, Sokka disabled the crossbow by cutting it in half with his sword. Hakoda took down the next one by throwing two bomb in the building and Katara froze the guards and weapons of a third battlement with her Waterbending. The trio landed on a cliff between two battlements and split up. Sokka and Katara took out another battlement with ease: Katara disabled the guards with her bending, granting Sokka the opportunity to slice up the crossbow. Hakoda, however, had more trouble with his. Although he successfully managed to take out the battlement, he got hurt in the process.

After destroying the battlements protecting the entrance to the Fire Nation harbor, the invasion force pushed and started their ascend of the volcano that contained the Fire Nation capital city. The pathway, however, was lined with many more battlements. These were easily taken down by The Boulder, The Hippo and other Earthbenders by creating an avalanche that caused the battlements to slide down the slope of the volcano.

It appears that the Fire Nation eventually repaired or replaced many of these battlements immediately after the invasion was repelled, as the capital showed no visible signs of damage during Fire Lord Ozai's coronation as Phoenix King.

Exterior
The battlements lined up beside the pathway leading to the base of the volcano holding the Fire Nation's capital city were octagonally shaped. The were build from strong, gray stones, leaving no openings with the exception of a single metal door and a peephole facing the pathway. A large metal crossbow is partially protruding from this peephole, allowing it to switch direction in order for a better aim. The thick walls of the battlements support a red roof with yellow details, giving it a similar appearance to a pagoda.

Interior
The inside of the battlement is pretty dark due to the limited illumination. It is one single room with an open first floor made out of wood. The battlement houses no items for the comfort of the soldiers, only objects used in battle: there are several barrels containing blasting jelly to fuel the bombs, a rack holding extra harpoons, a machine to haul in every vehicle that has been captured with the harpoon and a large, metal crossbow that serves as the battlement's main weapon, which is kept at the first floor. In the middle of the single room stands a ladder to allow the soldiers manning the battlement to easily switch levels.