User blog comment:Godisme/Everything But The Rain Op. 3 Dark of the Moon/@comment-6603670-20130319033747/@comment-1393830-20130319034404

So a little before 110 years ago, the captain of the 10th squad died. Then came the turn back the pendulum arc involving the visored. This current mini arc is about 20 years before the start of the story.

As for he Visored, only Shinji, Rose and Kensei went back as they filled in the 3 empty captain spots. The others are still in the Human world as seen sometime around chapter 481.