John "Soap" MacTavish (Original)

"Right...what the hell kind of name is "Soap", eh? How'd a muppet like you pass selection?"

- Captain Price

Sergeant "Soap" MacTavish, is one of the characters in the game, Call of Duty 4: Modern Warfare. He plays a major role during the Ultranationalist Crisis, a newcomer to the SAS and part of Captain Price's Bravo Team. Soap is one of the characters the player will assume the role of, and is the primary protagonist. His life is unknown after the events of CoD 4.

History
"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 Straight. On board the ship, they discover a nuclear bomb bound for Russia, though enemy Mig's 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, doing so fantastically, 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 Azerbaijjan, 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 Staff-Sergeant Griggs, moments before Griggs was killed, and was then witness to Gaz' execution at the hands of Imram Zakhaev. A wounded Captain Price passed Soap his sidearm, and Soap personally killed Imram Zakhaev, before blacking out, and possibly dying, while being given medical attention by Sergeant Kamarov. (though as the Russian Loyalists arrive, your only objective of surviving the escape is fulfilled)

Epilogue
After the end credits, the level Mile High Club loads where an unspecified SAS operative and his team are storming a large jetliner attempting to rescue a hostage under a difficulty dependent time limit. The event takes place outside of the previous storyline and no briefing is given making it nothing more than an Easter Egg. The introductory monologue makes a reference to the film "Airplane!". It has become something of a fan favorite. Some believe that the mission is just for the Arcade Mode, others think it may be a hint or a next "Call of Duty", but it is highly unlikely.