Lombardia run for "Never start a land war in Asia"

[Robert de Bruce]

I started a Ironman run with Desiderius in 769, going for several achievements including Iron Crown and Never start a land war in Asia. everything went well so far. Using a fabricated claim on Ingria (must be St. Petersburg or near it), I got access to Russia and made my way with holy wars.
My question is, due to terrain and my long supply route to my main base in Italy, the first war vs Uyghur took very long. To be precise, I had declared war on a Uyghur revolt and captured in a battle the Uyghur king they were rebelling against. I won my war, the revolt failed finally, so now I have imprisoned Uyghur king and no treaty with Uyghur. Unfortunately, I cannot declare war on my prisoner. Can I somehow use this situation for a quick gain without having to wage war for several years again? Unfortunately, the Uyghur king does not have the money to buy himself out, too.

 

[kmh42]

You just can push the Uyghurs into a succession war and internal struggle hopefully by killing him. That's not much there are no special events that give you any more options.

 

[szmik]

do it the hardcore way, through Hungary and steppes

 

[Robert de Bruce]

I do not want to blob this much, I need Empressive, too and I guess it will be easier with a small empire.

 

[nkibilko]

Unfortunately hostages aren't bargaining chips, though they definitely should be. If you hold a king captive you should basically be able to get almost anything in order to set him free, including his title as king.

"Well King, looks like you're my prisoner... I'll tell you what though, you hand me your crown, and i'll let you live. OR you can deny it, and i'll just kill you. Either way, your reign is coming to an end. So, live or die?"

Pretty simple concept...

It should also extend to immediate family members of a ruler...

"Well King, we have your favorite son. You can have him back if you surrender your kingdom."

I know there are lots of strong willed men who would have said "lol no", but also there were plenty of pushovers prepared to sacrifice anything for the lives of their children.

At least give us the option. Of course they'd be programmed to say "No" most of the time, but in a game like this i feel like it should be possible to extort titles from prisoners.