"Family history time: my brother's father, Aral Vorkosigan, planned and commanded the invasion of Komarr. It was a beautiful job, to start with. The Komarrans started at a major disadvantage, because their planet doesn't have breathable atmosphere; they all live in sealed arcologies. So, credibly threaten to crack the domes, and they fold like a bad hand of cards. It was almost that simple, except, of course, politics. One of the Barrayarans decided that a bloodless conquest didn't sit well with him, and he rounded up and murdered two hundred high-ranking Komarrans. When Aral found out, he killed the man in a rage, unfortunately making it difficult for outside parties to verify whether or not he'd been acting on secret orders, and Aral's name was permanently smeared, particularly on Komarr itself. I'm personally pretty sure he had nothing to do with it, because he's not a shortsighted bloodthirsty fucking idiot."