When studying ancient civilizations a geographer would be most interested in looking at

climactic influences on food production

A geographer that is hungry for information about ancient civilization will be thrilled to take into consideration the topic on climactic influences on food production. It has been a common knowledge for everyone that the survival and sustainability are among the reasons in which civilizations are developed. 

The Whiskey Rebellion was a significant event in American history because it proved that the U.S. government was willing and able to suppress violent opposition with military force. The events during this rebellion also played a significant role in the development of political parties.