Probably the same way. Just so that I know I'm being clear: while three players can play GC at once, only two can engage each other in battle at any one time. For example, if the Empire is holding one planet and both the Rebels and Zann Consortium send fleets to attack it, the first fleet to arrive fights the Empire, while the second fleet meets the winner. That's how I interpreted it, anyway.
"We think in language; therefore, the quality of our thoughts can only be as good as the quality of our language."
-- George Carlin