Echo Team (ODST)
From Halopedia, the Halo wiki
The Special Warfare Center at Songnam, Kyonggi Province is home to the 340th ODST Combat Training Unit. The "Adversaries", as they are known, provide instruction to other Special Forces and Marine units through the use of Covenant tactics.
The 340th CTU is also attached to the UNSC Operational Test and Evaluation Center (UNSCOTEC). They have provided realistic operational testing for new and modified weapons systems.
Two squads in the 340th are Kilo and Echo Teams.
This unit appeared in the HGN story, Armor Testing.
