"To my recollection they only had Dunovs and Marzas pre invasion. Dunovs being part of the massive trading fleet and Marzas being part of the mining fleet. These being the only ship designs still in service from that massive fleet, not that they were the only capital designs. The Kol was the first Warship from the TEC and it stands to reason the Sova was developed at the same time but fielded second."
My computer wouldn't cooperate trying to cut out the rest of that post...
Anyway, yes, they had Dunovs and Corsevs as massive trade ships, and probably Akkans in their current role. And the Marzas were part of the mining fleet, but the only dedicated warships they had were the Cobalts and Sova(which is stated in the game manual as being built as a mobile platform to house strikecraft since they were apparently effective against pirates, and has been a staple of the fleet for hundreds of years.)
Also, in the base game, every planet except Dead Asteroids do have defenders, even if it's just a Cobalt and a Krosov. Even some of the neutrals have a couple pirate ships that are based there. (More likely if there's an extractor there.)
EDIT: Huh, looks like most of that was already covered.