Good to get them out of the way.
I'm talking about two kingdoms that Chingghis waged offensive war against, one of which he attacked to flank the Chin on their western [undefended] border prior to his offensive war against the Chinese.
I'm as great an admirer of the Yakka Mongols as you'll find, but facts are facts. Once Temujin united the tribes, he waged several wars of aggression, two at least [Hsia Hsia and the Chin] without cause. Kara Khitai had been taken over by Gukluk, a Naiman opponent, and the Khwarism Shah murdered a Mongol Ambassador, which was a casus belli. But Hsia Hsia was atacked for its location, and the Chin were attacked for their wealth.