After the release of the Hex World map, I have looked for something that could prove to finally be the biggest map on Warlight.
And I have found a map to make for it:
The map of the world from Hearts of Iron 3. Here it is:
I believe the map is divided into (combining land and sea) over 10,000 provinces. Completing it would be a monstrous task, but it would sit as the biggest map on Warlight for a long time.