What did people in the first civilizations do in order to grow crops?

The first civilizations developed in river valleys, where fertile land made it easy to grow crops and feed large numbers of people. The rivers provided fish and water. They also encouraged trade, which allowed the exchange of both goods and ideas. The cities that developed in these valleys became the centers of civilizations.

the story goes that because of this belief, constantine was able to defeat his foes. constantine became an ardent1 christian. christianity and other religions were tolerated under constantine's rule. constantine also was responsible for the building of a great cathedral in rome.

should be the answer hope this

operation overlord was the codename for the battle of normandy, the allied operation that launched the successful invasion of german-occupied western europe during world war ii. the operation was launched on 6 june 1944 with the normandy landings