Looks like an army shipment got intercepted in this run down area of Rocket City.
One of the classic cobalt maps; as mechanics changed and the game improved I felt it was due for an update.
Looking back, maybe it changed a little too much, but I don't think necessarily for the worse. The old map was too plain and spacious.
I've since made another remake of the map:
Gamemode: Deathmatch
Authors: Oxeye (original map), Janeator (remake)
Initial release: 14/8/2012
Last updated: 19/8/2015 (on my end)