A change that occurred in the US military following the end of the Vietnam War was C.) It became an all volunteer force.
Just took it on Egde
Glasnost
It was started by the leader of the former Soviet Untion, Mikhail Gorbachev, beginning in 1985 and as the policy (or practice) of a more open government and more sharing of information.
Your answer is that the main reason is that people buy land and they needed to get money which means there really greedy people so the buy slaves and force them to work for little or no money so they can sell crops (they made the slaves become farmers) to make profit then they would buy more land and get more slaves to work as farmers on and on. So it spread because one guy did it and he made a lot money and other people wanted to do the same and that's how slavery spread through North America.
Answer:
Migration period, also called Dark Ages or Early Middle Ages, the early medieval period of western European history—specifically, the time (476–800 CE) when there was no Roman (or Holy Roman) emperor in the West or, more generally, the period between about 500 and 1000, which was marked by frequent warfare and a virtual disappearance of urban life.
The "Dark Ages" is a historical periodization traditionally referring to the Early Middle Ages or Middle Ages, that asserts that a demographic, cultural, and economic deterioration occurred in Western Europe following the decline of the Roman Empire.The term 'The Dark Ages' refers to the period between the fall of the Roman Empire and the Renaissance: the 5th – 14th centuries. It has been suggested that this period saw little scientific and cultural advancement.