In Russia, a group calling itself Force Majeure, also known as the Global Liberation Front, is planning on making and using nuclear weapons to attack the United States. Intel from operatives in Eastern Europe suggests that Force Majeure's movements in the abandoned Kellski naval shipyard in Kamchatka, is a potential terrorist threat. The SEALs are sent in to investigate, supported by two Spetsnaz operatives, codenamed Polaris (Jim Ward) and Bludshot (Quinton Flynn). The team discover evidences that Force Majeure is creating a nuclear bomb. With their findings, the team gets extracted by the USS "Michigan". With Force Majeure nowhere to be found, things look grim, but fortunately the Russian Federal Security Service detects the presence of the terrorist group after investigating a supposed nuclear fuel spill. Disguised as members of the decontamination crew, Force Majeure operatives infiltrated the plant with additional terrorists arriving later. Their plan was to steal a vast amount of enriched uranium to be used in their "dirty bomb". The SEALs and their comrades are sent into the plant to escort a radioactive specialist, codenamed Flatfoot, to see how much uranium had been stolen. The findings were not good, as almost all of the uranium storages had been emptied. In the final mission of the game, the SEALs infiltrate a ship, the "Bitter Moon", with a large payload of radioactive material, bound for Seattle, Washington. The terrorists are planning to detonate the ship near to the Seattle. Aboard the ship, the SEALs discovered that MALLARD, the informant from the first mission, is actually an operative working for Force Majeure. He had used SOCOM to eliminate the Sesseri Syndicate, thus tying up a loose end, as Force Majeure had bought plutonium from the Syndicate before. The SEALs moves in and defuse all bombs placed on the ship. The female leader of Force Majeure, Valeska Lukanov, is either killed or captured. Mallard, whose real name is Arjan Manjani, is killed. The team releases a smoke grenade as a signal to the USS "Michigan" to stand down, and the mission is complete.