West District is a military district of the Federated States of America on Earth. The region covers nearly all of the west coast of the North American continent. Its administrative center is Cascadia Metroplex, also called Megacity Twelve. Its economic center is the Bay Area Metroplex, called Megacity Four. The third megaplex, Megacity Two, formerly SoCal Megaplex, was renamed New Angeles Megaplex after it was destroyed in 2114 and rebuilt.