"The very practical version of what happened, without the squishy feelings, was that Leng Peishan was the leading general in the Southwest. An important border. Also constantly smouldering, politically speaking. And it was getting worse.
And Leng Peishan was getting old, possibly sick, and he was not communicating with the capital much. Pretty much the only family he had was his granddaughter. A brilliant granddaughter who I am definitely not biased towards.
...I'm not sure of how it is in Cascadia, your military is probably very different, but that's. A highly concerning combination. There was too much risk that he'd try and secure himself a legacy in the worst way possible.
The smartest move would be to marry his granddaughter to some young, trustworthy general who he could pass his army onto when the time comes. And another military family would have been better option tied to be tied to the Leng family.
...but it turns out he wasn't planning to rebel anyway. And one of the few things he and his granddaughter agreed on was neither of them appreciated her being used as a pawn to stop him from doing something stupid, and that she should get to marry whoever she wants." A small, sad smile. "As I said, I was very lucky."