Dreadlords suck butt.
Anyway, in the two sandbox games that I've played, I've always been situated next to the Drengin, out of NINE other opponents. The first one was a medium map, and they were peaceful for a while... but since I hadn't built up too many defenses yet, they declared war on me.

They surrounded my outer planets and I just got tired and handed all of my planets over to the Torians.

The second, and current, game I'm playing is on a large or gigantic map, one of those two. I thought I would be relatively safe and have time to take it easy, but then I noticed a tiny red dot flash by on the minimap.

I went in to confirm and yes... I was right next to the Drengin... again.

They haven't been that bad this time around though. That may have something to do with the Altarians who have a whopping 50+ planets right next to us. The Drengin were at war with them and the Iconians for a while, but after having their fleets decimated and losing planets and starbases, they negotiated a peace treaty.

No race has been knocked out yet. Once these cache crashes are cleared up, I should be able to finish this game much faster.