The Union, which consisted of the northern states, was victorious in the Civil War.

The primary cause of the Civil War was the issue of slavery, as the southern states sought to preserve the institution of slavery while the northern states opposed its expansion.

Abraham Lincoln served as the commander-in-chief of the Union army during the Civil War.

Robert E. Lee served as the commander-in-chief of the Confederate army during the Civil War.

The Battle of Gettysburg is considered to be the turning point of the Civil War, as it marked the farthest northern advance of the Confederate army and resulted in a decisive victory for the Union.

The Emancipation Proclamation was a document issued by President Abraham Lincoln in 1863 that freed enslaved people in the Confederate states.

The Thirteenth Amendment to the U.S. Constitution, ratified in 1865, abolished slavery.

Ulysses S. Grant led the successful siege of Vicksburg, Mississippi, which was a major turning point in the Civil War.

Thomas J. Jackson was known as the "Stonewall" for his steadfastness in battle.

William T. Sherman led the "March to the Sea," a devastating campaign that cut a swath of destruction across Georgia.

The Battle of Gettysburg is considered to be the bloodiest battle of the Civil War, with over 51,000 casualties.

The H.L. Hunley was the first submarine to sink an enemy ship in combat.

George B. McClellan was known as the "Fighting Quaker" for his religious beliefs and his cautious approach to warfare.

The Monitor was the Union ironclad ship that fought the Confederate ironclad Merrimack in the Battle of Hampton Roads.

J.E.B. Stuart was known as the "Wizard of the Saddle" for his skill as a cavalry commander.