Biography; Captain John "Soap" MacTavish

"Soap" begins his SAS Career hours before the six-day global conflict begins. He starts out as a Sergeant, unusual in that newcomers to the SAS are demoted to Trooper so that they must learn from the ground up.

He is given a quick training session in weapons and techniques by Gaz, before being introduced to Captain Price and the rest of Bravo Team. Passing the Close-Quarter-Battle test (intended to be reminiscent of the real SAS "Killing Houses") he is placed on the team and briefed on the mission, to infiltrate and assault a Cargo Ship in the Bering Strait. On board the ship, they discover a nuclear bomb bound for Russia, though enemy MiGs interrupt their investigations, and Soap is just lucky enough to escape with his life, being forced to leap for the ramp of their helicopter just as it begins flying away which causes him to lose his grip just to be rescued at the last second by Price.

Upon completing the mission, Soap, Captain Price and Gaz move into Russia to extract the informant who supplied them with the intelligence for the Cargoship, a man codenamed Nikolai. Working in close conjunction with Russian Government Loyalists led by Sergeant Kamarov, they successfully extract Nikolai, though their helicopter is shot down by Ultranationalist anti-aircraft missile fire. Bravo Team, Nikolai and another SAS Operator are forced to fight their way through enemy lines, before being provided with support from an AC-130 Spectre Gunship, callsigned "Wildfire". They are extracted by helicopter under cover of heavy air support from Wildfire.

Soap's next mission would take him to Azerbaijan, with Bravo Team. Clearing through an abandoned village, Soap was witness to Khaled Al-Asad's execution by Captain Price. The next day, it appears Soap was designated the team's support man, being equipped with both an M249 and M21 sniper rifle. He was placed in charge of covering the team's retreat with the Minigun from a downed Black Hawk (destroying several Ultranationalist Helicopters in the process) and detonating the explosive charges placed at Phase Lines Bravo and Alpha.

MacTavish's final mission (that we know of) saw him infiltrating Russia as part of the joint task force of US Marines and SAS Operators in order to eliminate Imran Zakhaev's nuclear capability. He was in charge of destroying the electricity supply to the facility, and then, during the escape, provided all-around covering fire for their jeep as they made their way to the extraction site. Fighting fiercely at the bridge during the penultimate battle, he was thrown to the floor and severely injured by an exploding tanker. He was pulled into cover by SSgt. Griggs, moments before Griggs was killed, and was then witness to Gaz' execution at the hands of Imran Zakhaev. A heavily wounded Captain Price slid Soap his M1911 pistol, and Soap personally killed Imran Zakhaev and two of his bodyguards. Soap whites out as he is being extracted by helicopter. His fate initially remains unknown, however, it is revealed that he survives.

After those events, Soap is eventually promoted to Captain. Now a grizzled veteran, he is called to be part of the Task Force 141, as a new crisis strikes Russia.

source: callofduty.wikia.com