How does Truong Nhu Tang use imagery in A Vietcong Memoir: An Inside Account of the Vietnam War and Its Aftermath?

Imagery:

"South Vietnam had been turned into a crucible of suffering - a nation that was finding out, in its flesh, what it means to be a pawn in a world of great powers. It was a situation that cried out for involvement."

"Another dietary supplement which I eventually learned to eat - if not with relish, then at least without gagging - was jungle moth. Often, as we sat around our oil lanterns at night, talking or going over plans, we would catch the big moths fluttering around the light. With the wings off and barbecued quickly over a flame, it wasn't exactly a tasty morsel, but it wasn't that bad either."