Clear the Cache of Your Console. Another common reason for the Call of Duty Modern Warfare Multiplayer not working error is the corrupted cache data. In this case, you can try clearing the cache files on your PC or console to fix the issue.
Colonel Alejandro Vargas is a character featured in Call of Duty: Modern Warfare II. The leader of Los Vaqueros and allied member of elite counter-terrorism unit Task Force 141, Vargas is a Tier One Mexican Special Forces Operator.
The Los Vaqueros is an elite unit of the Mexican Special Forces, led by Colonel Alejandro Vargas alongside with his second-in-command, Major Rodolfo Parra. All soldiers of the unit are handpicked for their loyalty to the country and their skills.