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.
The American Civil War was the largest and most destructive conflict in the Western world between the end of the Napoleonic Wars in 1815 and the onset of World War I in 1914. The Civil War started because of uncompromising differences between the free and slave states over the power of the national government to prohibit slavery in the territories that had not yet become states.