Well, what do -you- think happened after capella?
SD Famine Crisis (15 hours-3 weeks)
The GTD Nereid's subspace drive melts down when activated, causing a 24 hour gap until she can be deployed to collapse the Vega node. During this time a number of Shivan ships escape into Vega. (How they survived the supernova is not clear.) Three destroyers are destroyed in a bomber attack at the Capella node; the SD Famine and three corvettes escape and are hunted down over the next three weeks. Go play Cleaning Crew; that'll tell you more.
The Rebuilding Initatives (4 weeks-7 years)
The GTVA launches a massive shipbuilding program with the dual purposes of stimulating the economy and rebuilding their fleet. Despite considerable upheavals, it works. Under the auspices of the Rebuilding Initatives several large research and development projects come into existence. The most important of these are GUNSLINGER, the anti-juggernaut project, and WARRIOR, a project to improve the GTVA's ability to invade a defended world based on lessons learned during the fighting with the NTF.
Vasudan Civil War (5 months-7 months)
Not telling. You'll have to play Police Action (mine, not TopAce's) when it's done.
Fragment Fri'la Invasion (2 years)
Still not telling. An as-yet unnamed multi-mini-campaign sequence involving Raa's Lizards will chronical this one.
Fragment Giz First Contact (2 and a half years)
More Lizards. But you don't shoot at them this time. You shoot at what's chasing them.
Operation Test Drive (3 and a half years)
The GTVA pokes the hornet's nest via the "Lucifer Node" in Luyten in an extended combat recon and probing attack. It is successful and several sizeable Shivan forces are defeated before the GTVA withdraws and shuts the door behind them.
Ancients War (5 years)
Back From the Grave is the title for this one; it's not done yet. You might guess, correctly, that it has to do with my sig. Beyond that I'm not telling.
Third Shivan War (15 years)
Stuff. And things. Look, I haven't worked this out yet, okay?