Secret area alert 1, in cargo area at opposite end of the truck, last 2 crates on outside, kick one on the left, armor and flack vest inside.
Secret area alert 2, inside compound, the large building with bay doors, go to the opposite end from water tower, between the two buildings are boxes to climb up onto the wall, walk around to the building furthest from the water tower, jump onto the roof, walk to corner with cable to the next building, go across cable, jump onto roof, go down through sky light, drop to the floor, 45 ammo on crates, beneath Nazi flag, turn to the left, shoot shells on the dolly, it blows the crate open, treasure item inside.