Earth Kingdom harbor

The Fire Nation Harbor is located in the southwestern part of the Earth Kingdom. The harbor serves as a point for ships to dock and resupply.

It seems that this harbor is a strategic point since it is in close proximity to the Southern Water Tribe and in a near enough point to provide the Fire Nation Army with troops and supplies for their further push into the Earth Kingdom, specifically to Omashu and Ba Sing Se. It remains under construction when first seen, noting the lack of buildings and fortifications and the number of tents.

The leading officer in charge of the harbor was the newly appointed Commander Zhao, but it probably came under the command of another officer following Zhao's departure to capture the Avatar.

History
In "The Southern Air Temple", Zuko comes to the harbor to have repairs on his ship after his first confrontation with the newly awakened Avatar Aang. Commander Zhao has some people interrogate the crew on Prince Zuko's damaged vessel. It is after these interrogations that Commander Zhao finds out the Avatar is alive.

The Fire Nation Harbor is not seen again, but due to the fact that The War ended in Earth Kingdom victory, this harbor was likely repossessed or shut down by the Earth Kingdom government.