Oligarchy, government by the few, especially despotic power exercised by a small and privileged group for corrupt or selfish purposes. Aristotle used the term oligarchia to designate the rule of the few when it was exercised not by the best but by bad men unjustly.
Answer:
Britain's debt from the French and Indian War led it to try to consolidate control over its colonies and raise revenue through direct taxation (e.g., Stamp Act, Townshend Acts, Tea Act, and Intolerable Acts), generating tensions between Great Britain and its North American colonies.
The Great Migration is depicted in the image. Also known as the Great Northward Migration, it marked the movement of 6 million african americans from the rural south of the United States to the Northwest, Midwest and West, that took place between 1916 and 1970. It was one of the most rapid internal migrations in the world not caused by war or famine, and it meant leaving their economic and social base to find a new one, made easier by the labor shortage that WWI had generated.
1: Battle of Civetot 1096
2:Siege of Antioch 1097
3:Siege of Jerusalem 1099
4: Siege of Lisbon 1147
5:Siege of Damascus 1148
Sorry I don't have enough time to identify the cause events and effects but hopefully this helps you out!