A 14th tiny, very dim, moon was discovered in 2013 and awaits official recognition. Triton, Neptune's largest moon, orbits the planet in the opposite direction compared with the rest of the moons, suggesting that it may have been captured by Neptune in the distant past.
History & Culture. The US Civil War lasted from 1861 to 1865 and led to over 618,000 casualties. Its causes can be traced back to tensions that formed early in the nation's history. Economic and social differences between the North and the South. With Eli Whitney's invention of the cotton gin in 1793, cotton became very profitable.
In the years prior to the Civil War almost all sectional conflicts revolved around the slave issue. This began with the debates over the three-fifths clause at the Constitutional Convention of 1787 and continued with the Compromise of 1820, the Nullification Crisis, the anti-slavery Gag Rule, and the Compromise of 1850.