"Unintended Consequences" is a crossover between I-War and nBSG (the newer "Battlestar Galactica" series). Written by PhantomVX2000.
This is the original I-War's alternate future where New Alliance government didn't collapse due to bankruptcy and poor management as stated in I-War 2: Edge of Chaos. Actually, New Alliance renamed itself as Systems Confederation, but with much better management.
The Earth Commonwealth is still around, but they have retreated to a small enclave consisting few star systems and now they are publicly known as Commonwealth Remnants by 2309.