British Army brigade... recruited from Nepal... based in India... now with British citizenship.
Which civilisation should they be associated with?
You can learn about them here:
http://www.army.mod.uk/brigade_of_gurkhas/history
and here:
http://en.wikipedia.org/wiki/Gurkha
I think the Wikipedia page needs updating because UK government made some recent changes.
They were around a long time before WW2. The unique feature is their traditional Kukri knife, and they are associated with (or atleast I associate them with) jungle warfare.