(CNN) -- A new teaser trailer for "Call of Duty: Black Ops 2" reveals important details about the setting and gameplay options for the latest title in the blockbuster "Call of Duty" series. The clip was posted online Tuesday night and has already attracted 1.4 million views on YouTube. It features a near-future scenario in which the U.S. military has developed technology that puts unmanned vehicles and robots on the front lines of battle. An enemy gains access to that technology and turns it against cities all over the world. Developed by Treyarch and published by Activision, "Call of Duty: Black Ops 2" will be released November 18. Its predecessor, 2010's "Call of Duty: Black Ops," is the best-selling video game ever in the United States, according to some estimates. Mark Lamia, Treyarch...