User blog comment:Master Sima Yi/Assassinews 04-06-'12 — E3 hub/@comment-5254145-20120608134914/@comment-5254145-20120608145325

If you watch the Connor teaser trailer it says he was born in 1755 & joined the order in 1770. That's why I'm called Kenway1755. This means he joined when he was 15 years old. Go check again if your not sure.