Princeton's WordNet(5.00 / 1 vote)Rate this definition: 1  fauna, zoology(noun) all the animal life in a particular region or period. the fauna of China; the zoology of the Pliocene epoch. 2  zoology, zoological science(noun) the branch of biology that studies animals.
The American Civil War, widely known in the United States as simply the Civil War as well as other sectional names, was a civil war fought from 1861 to 1865 to determine the survival of the Union or independence for the Confederacy.
National Archives. The Civil War is the central event in America's historical consciousness. While the Revolution of 1776-1783 created the United States, the Civil War of 1861-1865 determined what kind of nation it would be.