A better description of the Vietnam War would be that it was a struggle against colonialism. The Vietnamese were fighting against French oppresion at first but were later fighting against american occupation which tried to gain control of the country due to the fact that they didn't want for communism to spread.
Longitude measures the number of degrees EAST or WEST of the Prime Meridian which runs through Greenwich, England. Lines of latitude run east-west around the globe and are used to measure distances NORTH and SOUTH of the equator.
