The Indus River is the correct answer.
Because when the natural rubber supply from Southeast Asia was cut off at the beginning of World War II, the United States and its allies faced the loss of a strategic material. <span> So the companies, in collaboration with a network of researchers in government, academic, and industrial laboratories, developed and manufactured in record time enough synthetic rubber to meet the needs of the U.S. and its allies during World War II.</span>
Answer:
Explanation:
The official reason given is to stop the spread of communism. What really was at stake was the American Empire thought it was being threatened. There is a subtle difference in motives.
<span>Two major effects of the Crusades were that the kings' authority increased and the Europeans learned about new things from the Muslims they encountered.During the Crusades, the kings increased taxes to fund the cause. Many peasants also left their land to fight, and when they died, the land went to the king. With large amounts of money and land coming in, the kings gained power.</span>
