Echo Team is a US unit from Call of Duty: Modern Warfare 3. In the Sender mission, they help Task Force 141 with the search for Waraabe and with the rescue and escape of Nikolai. Nothing else is known about them.

Call of Duty

The Call of Duty series has existed since 2003 and in addition to various spin-offs, including for the handheld systems Nintendo DS and Sony PSP, 14 major titles of the series have now been released. Ever since the first part of the series, great emphasis has been placed on the online multiplayer mode in addition to the single-player campaign, which is also reflected in the development of the shooter series. Since the first Call of Duty, World at     War, which was developed exclusively by Treyarch, each part also included cooperative challenges that you could play together with friends. The latest installment, Call of Duty: World War II, also features an extended multiplayer mode that puts you and your friends in the combat zones and famous battles of World War II. Using the divisions, you’ll be able to choose between the deadly sniper and the brute armored division and support your comrades in battle. In addition, World War II also has a zombie mode “Nazi Zombies”, as in its predecessor Call of Duty: Black Ops. Face the monsters of the Third Reich and win glory and honor.