<span>as a severe worldwide economic depression that took place during the 1930s. The timing of the Great Depression varied across nations; in most countries it started in 1929 and lasted until the late 1930s.</span>
Chinese River Valley civilization<span>although it was from 8000 to 2000 BCE
They used the river for irrigation and they raised pigs and chickens. Used stone tools</span>
<span>1. If my memory serves me well there were in about 350 000 African Americans who served in World War I. The huge part of them served as support troops. Only some of them fought alongside French army. According to this, the most suitable answer is: D. They served mostly in noncombad roles.
2. The Selective Service is the independent agency in the US which is used to maintain the information about those who is military conscripted. The Selective Service was designed to institute a draft to increase the number of men in the military. They provide all the names who registered to a military conscription to JARMS.</span>
What is in common with Mongols, White Huns, and the Mughals as well was that all of them were persecuting Buddhists along their conquests on either Europe or Asiatic soil. None of the mentioned civilizations were particularly fond of the buddhistic teachings.