The correct answer is agriculture. It was made possible for people to live on a single piece of land and not be nomadic anymore in search of food. Agriculture enabled them to settle around river valleys like Nile or Tigris and Euphrates. This is the era when civilizations started rising worldwide.
To protect any of its members or country threatened by communism
The North's goal was to invade the South to try to subdue their desire to secede, while the South's strategy was to defend their territory until the North gave up.
Communist party leader needed to retreat
Answer:
In fact, The Great Depression was a worldwide problem. In 1928, Germany, Brazil, and economies of Southeast Asia were depressed. Then, in early 1929, the economy of Poland, Argentina, and Canada was contracting, affecting the U.S. economy in the middle of 1929.