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The Potsdam Agreement (German: Potsdamer Abkommen) was the August 1945 agreement between three of the Allies of World War II, the United Kingdom, the United States, and the Soviet Union. It concerned the military occupation and reconstruction of Germany, its borders, and the entire European Theatre of War territory.
The US thought they could wear down the Vietcong with high casualties but the Vietcong saw the battle as a fight for their lives so they didn't wear down easily. Hope this helps!
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Irrigation highly depends on water sources in order for it to work. Without clean water, crops will die and wither. And polluted water causes filthy and contaminated trade routes, which are unsafe to travel across. Also, education has water fountains in the buildings (not sure now cuz of corona but clean water is used in school buildings.
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