Burma

Birmah was a coastal nation in the south of Asia.

Geography
Roughly south-east of Birmah was Siam and to the west was Hindoostan. The south-western coast of Birmah overlooked the Bay of Bengal. (TV: Survivors of the Flux)

History
Birmah appeared on a map of the region in 1904. (TV: Survivors of the Flux)

Behind the scences
In the real world, both Birmah and Burma are historical names of Myanmar. This has yet to be stated in the DWU.