America - Front
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"Escalation", the second downloadable content pack for Call of Duty: Black Ops, contains 5 all-new exceptionally varied maps; featuring 4 Multiplayer maps and an epic Zombies experience with all-new playable characters.
In Multiplayer, battle it out in "Hotel", on the roof of a Cuban luxury hotel and casino against the vivid backdrop of old Havana; "Convoy" delivers intense, close-quarters combat at the scene of an ambushed US military convoy; "Zoo" takes you on a wild ride in an abandoned Soviet Russian Zoo, with danger at every turn; "Stockpile" pits players in a remote Russian farm town housing secret WMD facilities. For Zombies fans, "Escalation" features a unique Zombies experience.
Source - callofduty.com