SEAL Team Six was part of the U.S. military assault on the Middle East, and was involved in the attack on the country's capital city, where terrorist leader Al-Asad was believed to be located. During the level "Shock and Awe", SEAL Team Six detected and confirmed a nuclear device at the center of the city, and notified U.S. field command, which dispatched NEST teams to neutralize the warhead. However, they were unsuccessful, and the nuclear warhead detonated with substantial casualties to U.S. military forces. It is assumed they are all dead, although they may have evacuated in time to have escaped the blast.
It would seem that the SEALs wear two different uniforms throughout the game: One that has a Multicam pattern, and another that is a more futuristic digital pattern. Another pattern is found on Uplink, where they wear a desert camouflage similar to the U.S. Marines in Call of Duty 4.
The SEAL Team Six assault rifle character model is the same as Crosby's, ableit with futuristic digital camouflage.
In early trailer and screenshots, the SEALs had a different model and colours on their gloves.
SMG uniforms have the name Harper on their name tags.