Sumer is the name of the earliest known civilization in Mesopotamia, and one of the oldest in world history.
Their growth can be attributed mostly to their success at agriculture, which enabled them to settle in large groups. There were several factors that contributed to the development of new technology and mechanisms of food production.
The first factor is the fact that Sumerians were settled in the valleys of the rivers Tigris and Euphrates, however, the area was mostly dry in terms of precipitation. This meant that farmers had to rely on the rivers, and not on rain, for irrigation. This lead them to develop a complex systems of canals that irrigated the crops.
Their irrigation system was so successful that Sumerian population rapidly expanded. Moreover, the soil was fertile because of the continuous flooding of the rivers. This flooding, however, meant that canals had to be constantly tended to and rebuilt, and Sumerians used a large labour force for this purpose.
Pressure to provide enough food for a growing population led them to continue to innovate, and this self-reinforcing cycle led to the development of technologies such as ploughs that allowed them to cultivate large areas of land with ease.
The American Revolution began in 1775
Answer:
The buying of 15% of America
Explanation:
Land included was two Canadian provinces, including the entirety of Arkansas, Missouri, Iowa, Oklahoma, Kansas, and Nebraska; large portions of North Dakota and South Dakota; the area of Montana, Wyoming, and Colorado.
The purchase was bought by Thomas Jefferson.
Germany returned Alsace-Lorraine to France.
Alsace -Lorraine was returned to France.
