Two characteristics of a feudal society is: 1) Power is based on owning land, rather than monetary wealth and 2) by owing service in exchange for protection and land, and this exchange becomes the basis of power. This exchange is the same from the the peasants to the king.
In response to the Berlin wall the United States created the Berlin airlift. Supplies were sent on planes and dropped into Berlin. These supplies included things such as food and water.
