Explain about Cu Chi Tunnels and Terrain." For context, these long winding Vietnamese tunnels were made in the late 1940s as a way for villages to communicate, to store and use supplies, and avoid imposing forces, among other things. I think the making of these tunnels during the first Indochina War, where Communist Vietnam was up against anti-Communist France, shows how "desperate," for the lack of a better word, the Vietnamese were. They were going up against a heavily supplied nation, so reverting to a life underground shows their vulnerable position.