Wing Commander mod.  It has capital ships, it has fighters, frigates and empires to go at one another.  I can see it as the Teran Confederation, the Kilrathi Empire, and the Landriech.

Now all I would need is some knowledge of how to tinker with this game, some support and interest.  I know where some models are already kicking around, would just need to look at getting some permissions and such.