Ganges? Let me know if this is it?
<span>The U.S. needed to contain communism and not let South Vietnam and surrounding countries fall to communism.
The U.S. government saw its involvement in the war as a way to prevent communism.</span>
A Map key and that thing where it has a centimeter represent a certain distance on a map.
Corporations charged them money for access to water.
The answer to your question is,
A. Railroad operations across the nation
-Mabel <3