American Civil War: Citing failing health, Union General Winfield Scott resigns as Commander of the United States Army.

Winfield Scott (June 13, 1786 May 29, 1866) was an American military commander and political candidate. He served as a general in the United States Army from 1814 to 1861, taking part in the War of 1812, the MexicanAmerican War, the early stages of the American Civil War and conflicts with Native Americans. Scott was the Whig Party's presidential nominee in the 1852 election, but was defeated by Democrat Franklin Pierce. He was known as Old Fuss and Feathers for his insistence on proper military etiquette, as well as the Grand Old Man of the Army for his many years of service.

Scott was born near Petersburg, Virginia, in 1786. After training as a lawyer and brief militia service, he joined the army in 1808 as a captain of the light artillery. In the War of 1812, Scott served on the Canadian front, taking part in the Battle of Queenston Heights and the Battle of Fort George, and was promoted to brigadier general in early 1814. He served with distinction in the Battle of Chippawa, but was badly wounded in the subsequent Battle of Lundy's Lane. After the conclusion of the war, Scott was assigned to command army forces in a district containing much of the Northeastern United States, and he and his family made their home near New York City. During the 1830s, Scott negotiated an end to the Black Hawk War, took part in the Second Seminole War and the Creek War of 1836, and presided over the removal of the Cherokee. Scott also helped to avert war with Britain, defusing tensions arising from the Patriot War and the Aroostook War.

In 1841, Scott became the Commanding General of the United States Army, beating out his rival Edmund P. Gaines for the position. After the outbreak of the MexicanAmerican War in 1846, Scott was relegated to an administrative role, but in 1847 he led a campaign against the Mexican capital of Mexico City. After capturing the port city of Veracruz, he defeated Mexican General Antonio Lpez de Santa Anna's armies at the Battles of Cerro Gordo, Contreras, and Churubusco. He then captured Mexico City, after which he maintained order in the Mexican capital and indirectly helped envoy Nicholas Trist negotiate the Treaty of Guadalupe Hidalgo, which brought an end to the war.

Scott unsuccessfully sought the Whig presidential nomination three times, in 1840, 1844, and 1848. He finally won it in 1852, when the party was already dying off. The Whigs were badly divided over the Compromise of 1850, and Franklin Pierce won a decisive victory over his former commander. Nonetheless, Scott remained popular among the public, and in 1855 he received a brevet promotion to the rank of lieutenant general, becoming the first U.S. Army officer to hold that rank since George Washington. In 1859 he peacefully solved the conflict of the Pig War, ending the last one in a long series of British-American border conflicts. Despite being a Virginia native, Scott stayed loyal to the Union when the Civil War broke out and served as an important adviser to President Abraham Lincoln during the opening stages of the war. He developed a strategy known as the Anaconda Plan, but retired in late 1861 after Lincoln increasingly relied on General George B. McClellan for military advice and leadership. In retirement, he lived in West Point, New York, where he died on May 29, 1866. Scott's military talent was highly regarded by contemporaries, and historians generally consider him to be one of the most accomplished generals in U.S. history.

The American Civil War (April 12, 1861 – May 9, 1865; also known by other names) was a civil war in the United States between the Union (states that remained loyal to the federal union, or "the North") and the Confederacy (states that voted to secede, or "the South"). The central cause of the war was the status of slavery, especially the expansion of slavery into territories acquired as a result of the Louisiana Purchase and the Mexican–American War. On the eve of the Civil War in 1860, four million of the 32 million Americans (~13%) were enslaved black people, almost all in the South.The practice of slavery in the United States was one of the key political issues of the 19th century. Decades of political unrest over slavery led up to the Civil War. Disunion came after Abraham Lincoln won the 1860 United States presidential election on an anti-slavery expansion platform. An initial seven southern slave states declared their secession from the country to form the Confederacy. Confederate forces seized federal forts within territory they claimed. The last-minute Crittenden Compromise tried to avert conflict but failed; both sides prepared for war. Fighting broke out in April 1861 when the Confederate army began the Battle of Fort Sumter in South Carolina, just over a month after the first inauguration of Abraham Lincoln. The Confederacy grew to control at least a majority of territory in eleven states (out of the 34 U.S. states in February 1861), and asserted claims to two more. Both sides raised large volunteer and conscription armies. Four years of intense combat, mostly in the South, ensued.

During 1861–1862 in the war's Western Theater, the Union made significant permanent gains—though in the war's Eastern Theater the conflict was inconclusive. On January 1, 1863, Lincoln issued the Emancipation Proclamation, which made ending slavery a war goal, declaring all persons held as slaves in states in rebellion "forever free." To the west, the Union destroyed the Confederate river navy by the summer of 1862, then much of its western armies, and seized New Orleans. The successful 1863 Union siege of Vicksburg split the Confederacy in two at the Mississippi River. In 1863, Confederate General Robert E. Lee's incursion north ended at the Battle of Gettysburg. Western successes led to General Ulysses S. Grant's command of all Union armies in 1864. Inflicting an ever-tightening naval blockade of Confederate ports, the Union marshaled resources and manpower to attack the Confederacy from all directions. This led to the fall of Atlanta in 1864 to Union General William Tecumseh Sherman and his march to the sea. The last significant battles raged around the ten-month Siege of Petersburg, gateway to the Confederate capital of Richmond.

The Civil War effectively ended on April 9, 1865, when Confederate General Lee surrendered to Union General Grant at the Battle of Appomattox Court House, after Lee had abandoned Petersburg and Richmond. Confederate generals throughout the Confederate army followed suit. The conclusion of the American Civil War lacks a clean end date: land forces continued surrendering until June 23. By the end of the war, much of the South's infrastructure was destroyed, especially its railroads. The Confederacy collapsed, slavery was abolished, and four million enslaved black people were freed. The war-torn nation then entered the Reconstruction era in a partially successful attempt to rebuild the country and grant civil rights to freed slaves.

The Civil War is one of the most studied and written about episodes in the history of the United States. It remains the subject of cultural and historiographical debate. Of particular interest is the persisting myth of the Lost Cause of the Confederacy. The American Civil War was among the earliest to use industrial warfare. Railroads, the telegraph, steamships, the ironclad warship, and mass-produced weapons saw wide use. In total the war left between 620,000 and 750,000 soldiers dead, along with an undetermined number of civilian casualties. President Lincoln was assassinated just five days after Lee's surrender. The Civil War remains the deadliest military conflict in American history. The technology and brutality of the Civil War foreshadowed the coming World Wars.