lot of vintage US military bags, beat to hell worn used tactical pouches & drab cotton zipper bag

Lot of three vintage military bags, all marked US. I know almost nothing about these (Army? Marines?) but they look so good, well worn, lots of history behind them I'm sure. The drab cotton bag I think is probably WWII vintage, it has a huge old metal zipper. The two pouches are not as old, though one looks older than the other.