This repo, unless specified otherwise, is GPL-2.0, like 0 A.D. - I intend to merge back some of it in the main game, though I think this repository might co-exist to make it easier for me to dev & to make it easier for other people to fork it.
Images & other art (not JSON / XML data) files in art/ are CC0.
Both World_in_300_BCE/ World_in_323_BCE come from Wikipedia and are CC-BY-SA 3.0.
The base map and derived files in working_data are taken from https://maps-for-free.com/ which is CC0.