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.
The issue of slavery ultimately did tear the Union apart, but 74 years before the start of the Civil War this volatile issue threatened to do the same during the Constitutional Convention when Northern and Southern states took strong positions on the issue. Those who opposed slavery in the Northern states wanted to bring an end to the importation and sale of slaves.