Probably marauders, yeah. Nothing else would have done that much damage to a fortress beneath a spire shield guard post.
Anyway... Only one direction left to conquer! I'm not taking the planets near the first Homeworld, just because they'd be very hard to hold and there's really nothing I need on them. (Two spire archives, but it's not like I'm short knowledge with 80 planets. I should be able to get to 110 planets without most of them , so I may have to cap a couple in the end just to reach that.)
The remainder of the bottom area gave me two more turret controlers (Missle and Spider), and a Spire Blade Spawner fab. That sounds fun!
I threw up a fifth city and now have a dreadnaught and 3 battleships. Upgraded my cities to the new tier of tech that unlocks, and built more core turrets at all dark spire worlds (of which I now have quiet a few). Then I cleared out 6000 threat, all of which was next to Murdoch. Game stopped running like a slideshow after I did that.
Then the Hybrid finished what it was building, which was a Dyson Antagonizer. It seems to be living up to its name, and making hostile Dysons. That's up at the last AI controlled main hub world. That world also has a black hole machine. That's awesome for me when I go to take it, because I want one there and can't build anymore (I already have two in places I want them). It's not so great for this purpose, since I don't want to attack yet. So no problem, I work my way up nextdoor. Then I send all my fighters, bombers, missile frigates, mini rams, SSBs, and Etherjets in to fight and distract the local ships while my Champion and Raid Starships sneak in to deal with the Antagonizer.
... then the special forces showed up.
I know it was them because of the H/K. That, and 2000 ships (and carriers holding another 4000) just showed up from next door. My distraction fleet did last long enough to get the job done, but they didn't do anything resembling the damage I'd have liked them to. Ah well, I chose those because they're a fast rebuild and don't really hinder my defense (which is still a super chokepoint world + spire fleet + starship fleet).
I should probably do something to shrink that though, 6000 ships just showing up can make a bad day. Guess I could go around the map and clear out all the special forces posts in my territory. Once effective AIP is over 1200 (and total is at 2500), it doesn't seem like a bit more is really going to matter.
Unlock: Galactic Capitol everything.
Achievements Earned: Control 80. I'm thinking once I get to 110 planets I'll go ahead and build the exogalactic transceiver, because I want to see if I can survive the siege that what by then will be 1500 AIP will create. <_< (Or maybe I'll just rolfstomp the homeworlds with this absurdly huge fleet, either way.)