Star Trek question: How was Khan captured ?

I have been thinking about how Khan Noonien Singh was captured during the Eugenics war. Who or what group finally took him down?

Does anyone have a headsup on this?

This is one Star Trek story I would love to write!

Maybe, as a crossover from other fandoms!

If there are others that have written about this...let me know!

Would love read it!

Have an awesome day!