Vietnam War Supplies are carried through jungle routes from North Vietnam (and Cambodia) to the South (Ho-Chi-Minh-Trail).

(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Vietnam War Supplies are carried through jungle routes from North Vietnam (and Cambodia) to the South (Ho-Chi-Minh-Trail). (Photo by ADN-Bildarchiv/ullstein bild via Getty Images)

Supplies for communist fighters in South Vietnam are moved on the Ho Chi Minh Trail, which ran through Laos and Cambodia. Efforts to cut off the flow were hampered by the supposed “neutrality” of those two countries. (ADN-Bildarchiv/Ullstein Bild via Getty Images)

ADN-Bildarchiv/Ullstein Bild via Getty Images