[SPOILERS] Why did Ser Jorah betray Viserys in Season 1?

I never quite understood that. I get that Viserys was a prick qnd everything, but didn't Ser Jorah have an oath that he dishonoured.

Submitted September 15, 2020 at 10:06PM by Memey-McMemeFace https://ift.tt/2RyOKvy