Call of Duty Online Timeline

Unknown date, 2011

 * Fission Committee is deployed by NATO to intercept a Shadow Company freighter in the Bering Strait carrying unknown cargo. Committee operative, Agent 7 discovers a container holding nuclear contents. An explosion damages the freighter and the operatives escape via helicopter, the container is lost.

July 23, 2013

 * Pfc. Rook is moved from Group 1138 due to his suspicions towards their research and is placed under John MacTavish's command as a member of Task Force 141.
 * Rook and TF 141 are deployed in Juarito by Col. Winston Harker to capture Hector Oritz, a weapons dealer who is working with the Brazilian Militia.

July 25th, 2013

 * Rook and Simon "Ghost" Riley are sent to a private island to find Alberto Vasquez, another dangerous gunrunner who is supplying Shadow Company and the Cortiz cartel with several high powered weapons, in his safehouse.
 * Rook captures Vasquez, but he is shot by a Shadow Company sniper to prevent Vasquez from telling the British their secrets.
 * Ghost finds intelligence in Alberto's safehouse and finds out that he was supplying Element 115 to Group 1138 under the order of Col. Harker.

July 27th, 2013

 * Harker is confronted by TF 141 and reveals that he is the leader of Shadow Company. Harker then reveals that he had been mixing the dangerous Element 115 with the chemical weapon Nova 6 to create the ultimate super weapon. Harker unleashes the weapon and causes a major catastrophe in China.
 * TF 141 is killed by Shadow Company.

Unknown date, presumably sometime in 2013

 * Group 1138 unleashes an army of 115 powered cyborg zombies.
 * Four survivors, Cowboy, Trigger, Lv Bu, and Sergeant fight off hordes of cyborgs at a Chinese military outpost.
 * A helicopter rescues the survivors and takes them to a lab owned by Group 1138 in an effort to get them killed. After fending off more zombies, another helicopter rescues them and takes them to a swamp for shelter, but it quickly gets attacked by zombies. The chopper retreats to find the source of the attack.
 * The helicopter returns and brings the survivors to HQ of Group 1138, but they are unable to destroy the zombie scourge and so they retreat.