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.
Fought from 1861 to 1865, the American Civil War was a war between the Union (almost all northern and western states) and the Confederate States of America (almost all southern states), primarily over the practice of slavery. To date, the Civil War remains the deadliest conflict in U.S. history.