User blog comment:Vincent Mackay/Has anyone seen this image from AC Unity/Helix??/@comment-413232-20150110222930

There is a quick summary an illustrations in Abstergo Employee Handbook about these missions. If I remember correctly from when I quickly looked inside in a book shop, the Crossed Blade mission is about the rise of Constantinople and the Byzantine Empire. For Jazz Age Junkies, I only remember the drawning of a Jazz club.