Imgur tutorial by BeerBeetsBattlestarGalactica
BBBG was on the verge of finishing the testing for his turkey map when he suddenly disappeared from warlight.The tutorial can be trusted as it works and his maps were good however i don't understand how he does the border with the trick he shows in that tutorial.
I go the above from a simple google search of division tool warlight.
Videos by Dodo Commander on map making
Don't know who made this but it's a tutorial for map making too
One way of building WarLight maps is to divide larger areas into smaller territories with the path division operation. It can be used to divide a single region into two according to another path that defines the border between the new regions.
To split a region, you naturally first have to have drawn this region as a proper Inkscape path. Begin by drawing the desired border as a new path using, for example, the Pen tool. It does not matter if the path defining the border extends outside the territory you wish to split, as it disappears when this operation is complete.
After drawing the new border, select the region with the Selection tool, and then also simultanously select the dividing path while pressing the Shift key. Then select the Division operation from the Path menu, or press its shortcut Ctrl+/. You now have two regions that you can modify separately, and perhaps split again to make smaller regions. It is a good idea to simplify the dividing path before doing this, as simplifying the two new regions afterwards separately usually changes their border shapes in different ways.
When splitting a large continent into bonus regions, you can make use of the Inset operation after making all the divisions. Using an inset of half a pixel (set by going to Inkscape Preferences and opening the Steps tab) on each of the bonus regions should make their borders appear adjacent in the recommended way. After defining all the bonus regions, no further insets are needed, as inside each bonus region the recommended way is to have the borders overlap. Because of this, the bonus regions and their insets should be done first when mapping a larger continent.
from warlight wiki http://wiki.warlight.net/index.php/Inkscape_tips