The Only Captain I ever got a chance to adopt was a captain in the first campaign I EVER played.

I was the Scipii, and I sent the Captain to win the siege of Athens, and he then defeated two Greek Armies.

I adopted him, and he was very worthy the rest of his life, he didn't get currupt like the rest of the family, or create unrest by entering a city.

He was a "bloodsoaked loony" by the end of his life though, since I sent him to take City after City and do nonstop battles untill he sacked Damascus, was sent to Cyprus and died on the way.