and the west was destroying vietnams fabric of life so visually and pronounced , for within its landscapes are legacies of the ones the americans obliterated as their aircraft tipped agent orange herbicide over hundreds of square kilometres of forest , virtually removing all natural vegetation from the dmz south from coast to vietnams border with cambodia , and in doing so , they willingly transferred lush forests into stumps , and after the war , wastelands becoming replanted with trees foreign to native vietnam , including the australian acacia family .