ECOAS (Earth COlony ASteroid) is a special task force established in 0094 U.C. by the Earth Federation Forces not long after the second Neo Zeon war. It was created as a clandestine group meant to do "wetwork", a.k.a. black-ops-type missions that are off the records. Because of its secretive and independent nature, ECOAS has its own command system that even Londo Bell has no authority over them directly. The task force first saw combat in Mobile Suit Gundam Unicorn.
ECOAS is a newly-established unit of the Earth Federation Forces that is tasked with exposing and mopping up Neo Zeon forces remnants. Their base of operations is Luna II. Their activities cover a broad range of things from military needs to simple policing, and they’re guaranteed special rights. Their existence is kept a secret within the Federation Forces. At least one team, 920 special forces team, stationed on board the Nahel Argama since their departure from Luna II and one more reinforcement team on board after the fight in Industrial 7.
After the second Neo Zeon War, a special task force was put together by the EFF to be in charge of hunting down Neo-Zeon remnants. This came to be the ECOAS, otherwise known as the Manhunter unit. They also seem to have some knowledge of the Unicorn Gundam. Their only known mobile units are the transformable D-50C Loto and the RGM-89De Jegan (ECOAS Type).
Collapse of Side 4's Industrial 7 colony
In 0096 U.C, Daguza Mackle leads his ECOAS 920 special forces team on an operation to prevent the opening of Laplace's Box. Traveling along with Londo Bell ship, Nahel Argama, ECOAS team infiltrate Side 4's Industrial 7 colony to capture the key of the Laplace's Box the RX-0 Unicorn Gundam. The ECOAS weren't successful in the capture of Unicorn Gundam due to there encounter with Neo Zeon remants and the collapse of Side 4's Industrial 7 colony.
Battle of Palau
After the Unicorn Gundam was captured by Full Frontal with the help of Marida, Banagher was taken to the nearby colony Palau. The Federation prepares to mount an assault on Palau to regain the Gundam while Mackle and the crew of the Nahel Argama come up with a plan to rescue Banagher as well. And for the mission, two ECOAS teams took jurisdiction of the mission, which Alberto Vist called unprecedented.
With both the Unicorn Gundam and Banagher taken to the asteroid base of Palau, Londo Bell in conjunction with two ECOAS teams, devised a rescue mission to get back both under their possession. The first phase involved two ECOAS teams led by Daguza Mackle to covertly land on the surface of Palau with a team of Lotos and soldiers to plant explosives around the two connecting shafts of the asteroid base. A soldier dressed as a bum gave the captive Banagher instructions to head to the 14th space gate, where the team of Lotos was waiting. After the explosives were detonated, the two halves of Palau collided, only targeting the industrial blocks but missing the civilian sector. The second phase utilized the Londo Bell forces launching their MS forces in combat against the Neo Zeon forces guarding the asteroid base. Then, the SCVA-76 Nahel Argama fired its main cannon at the base pushing the two disconnected halves together in a billiard effect. The operation ended in a success, with the retrieval of Banagher and the Unicorn, as well as the capture of the "quad-wing". The operation ended with the presumed KIA status of ENS Riddhe Marcenas and the missing Audrey Burne.
Ruins of Laplace
The Unicorn was then giving direction to the wreckage of Laplace, which passes in geosynchronous orbit at zero degrees longitude and zero degrees latitude every day. Mackle figured that another seal of the Laplace Program and rode along with Banagher inside the Unicorn Gundam to the coordinates.
- Daguza Mackle - Is the leader of the Earth Federation Forces' ECOAS 920 special forces team, and holds the rank of Commander.
- Conroy Haagensen - is the second in command of the ECOAS 920 special forces team, and holds the rank of Lieutenant Commander.
- A similar group, the Man-Hunting Attachment (MaHa), appeared in the novel Gaia Gear (1987), however, it is unclear if they are related to ECOAS.
- The name of the group appears to be based on the real life United States Navy SEALs (Sea, Air, and Land).