R.E.N. Spells Ren
Veteran
Yep, Tywin is brutal and ruthless but a clean rep is very important to him. The way Freys did Stark he wouldn't have done that under his own roof. There is a reason why the people praised Tywin over King Aerys during his first time as Hand.
So someone explain to me how Tywin sacking the city whilst serving as Hand wasn't breaking his oath.