Answer:
They created irrigation systems and used canals to control flooding. They also used the silt brought by the floods to help with their farming.
World War I began after the assassination of Austrian archduke Franz Ferdinand by South Slav nationalist Gavrilo Princip on June 28, 1914.
Answer:
a social system existing in medieval Europe in which people worked and fought for nobles who gave them protection and land in return.
Explanation:
Feudalism, also known as the feudal system, was the combination of the legal, economic, military, and cultural customs that flourished in Medieval Europe between the 9th and 15th centuries. the dominant social system in medieval Europe, in which the nobility held lands from the Crown in exchange for military service, and vassals were in turn tenants of the nobles, while the peasants (villeins or serfs) were obliged to live on their lord's land and give him homage, labor, and a share of the produce, notionally in exchange for military protection.
