While not being an expert in Tactical vests I have managed to pick up a few along the way. The US army has been playing around with Tactical/Load Bearing vests for quite a while now. I will post the examples that I have.
I think they started out with this one. It is a WWI grenadiers vest. It is an 11 pocket vest made of a cotton material There were tons of these sold for surplus after the war. This one still had the tape holding the straps rolled up!