
Ok, for a new map I'm making, I need some help with an idea. If any of you have played the maps Blood & Iron or Republique (both rather similar) with the invincible cities and such, that would be helpful (although not necessary).
The cities must be able to switch between each other (they're basically gateways, although some have stargates) - if an undefended city (no buildings and no units) is attacked (enemies around it), it must spawn troops. If the troops are beaten off, and all defenders are eliminated, then the city is captured. If it is not, then the city is taken.
Could some people help me lay this out? I have suspicions and ideas, but your help will probably shave a week or two off the production time.