The Rebel Navy focusing on aquatic combat was the naval force within the Rebel Alliance Military that operated in underwater environments. Their primary area of operation was on planets with significant water bodies, often engaging with the Imperial Maritime Division as their main adversary.
During the year 0 ABY, the Rebel Navy participated in battles on the fertile planet of Reytha, working alongside the Rebel Air Force and the Alliance Army. A Imperial army force, under the command of Darth Vader, successfully eliminated the Rebel presence on Reytha. The Navy maintained a base on an island of the Montrosa Islands and carried out ocean patrols until the battle concluded.
As a component of the Rebel Alliance Military, the aquatic Rebel Navy utilized the support of R2-D5 labor droids. Like the Imperial Maritime Division, the Rebel Navy deployed various combat vehicles on the water, including destroyers, frigates, cruisers, anti-air destroyers, and transports. These vehicles were manufactured at specialized shipyards. Utility trawlers were used to gather resources, such as fish, to support the Navy's operations.
The Rebel Navy is featured in the 2001 Star Wars: Galactic Battlegrounds video game. A mission in the Darth Vader campaign requires the player to destroy a Rebel Navy base. This mission, and consequently the Navy, is also present in the game's 2002 expansion, Clone Campaigns. Players controlling the Rebel Alliance can construct the vehicles used by the Rebel Navy in multiplayer matches.
Matthew Keast, a member of the development team for Galactic Battleground, suggested that the Rebel Alliance faced challenges when it came to naval warfare.