This hand-annotated map fragment reflects the kind of operational reference grids used by Forward Air Controllers, including the 'Misty' fast-FAC pilots, to pinpoint targets along the Ho Chi Minh Trail in Laos. Numbered 'Delta Points' and named locations such as Mu Gia Pass and Ban Nape mark key infiltration routes and known enemy transit corridors that were the focus of years of American air interdiction efforts during the Vietnam War. Project: 218862