The North. Winterfell. They obeyed him well enough when his bastard was flaying anyone who didn't. Karstark and Umber fought for the Boltons; Glover and Cerwyn and Manderly wouldn't fight at all.

[Now they're both frowning, and Jon searches his mind for a way to explain the answer to Robb's next question.]

I had heard that you'd married a foreign girl named Talisa, and that she'd died, but there's another girl who says she's your wife. Jeyne.