User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-4254431-20140930043008/@comment-746824-20141001041937

TouchGameplay has a whole lot of videos. Seems like the loading screen tips for the named missions are story. The others seem to be random events divided in two that don't even coincide with the dates the memories take place in.