I modeled this scenario after the popular "The Hunted" map in Half-Life. The map has several ambush places scattered around and is for 3 players (So someone has to be the Prez). This is only a beta and I have not tested it a whole lot in MultiPlayer, so please tell me about any problems you find.
Meant for 3 players, but I managed to win playing it as 1 player.
My bombard tower killed most of the yellow army, the red guys eventually
sent out an army to destroy some of yellow's walls, and I built some warships
to destroy some more of yellow's walls.
I think that it would generally be easy for red and blue
to win because red can make arbalests which will outrange
the Janissaries, and blue can research spies.
Yellow doesn't stand a chance if he doesn't delete some
of his walls. If he does, then he can capture the dock.