Answer:
1. Friend of the South and assassination victim --- Abraham Lincoln
2. Led a destructive march across the South --- William T. Sherman
3. Lincoln's Democratic opponent in the election of 1864 --- General George McClellan
4. President of the Confederacy --- Jefferson Davis
5. Former Union commander elected as president in 1869 --- Ulysses S. Grant
6. Republican Radical who was savagely beaten --- Charles Sumner
7. Commander of the Confederate forces --- Robert E. Lee
8. Candidate for the senate in 1860 who debated with Lincoln --- Stephen Douglas
9. Led the attack on Fort Sumter --- P.G.T. Beauregard
10. Escaped impeachment by one vote --- Andrew Johnson
11. Radical abolitionist who was hanged after an arsenal raid --- John Brown
12. Killed by one of his own men --- "Stonewall" Jackson
Explanation:
1- Abraham Lincoln was an American politician and lawyer who served as the sixteenth president of the United States of America from March 4, 1861 until his assassination on April 15, 1865.
2- William T. Sherman was an American soldier, educator and writer. His celebrity derives from his participation with the rank of general in the Civil War, where he received both praise for his efficient use of military strategy, as well as strong questions for his implacable scorched earth policy that applied in the March to the Sea.
3- George McClellan was an American soldier and politician, who participated in the early stages of the Civil War with the rank of Major General.
4- Jefferson Davis was an American politician who served as the sole president of the Confederate states from 1861 to 1865.
5- Ulysses S. Grant was the commanding general of the United States Army at the end of the Civil War, between 1864 and 1865; and the 18th President of the United States from 1869 to 1877. As commanding general, he worked closely with President Abraham Lincoln leading the Union Army until victory over the Confederate side.
6- Charles Sumner was an American politician and statesman from Massachusetts. A university professor and a powerful speaker, Sumner was the leader of the anti-slavery forces in Massachusetts and a leader of the Radical Republicans in the Senate of the United States during the Civil War and Reconstruction.
7- Robert E. Lee was an American general known for commanding the Confederate Army of Northern Virginia during the Civil War from 1862 until his surrender in 1865.
8- Stephen Douglas was an American politician from Illinois. He was a representative, senator, and candidate for president by the Democratic Party in the 1860 elections, losing to the Republican Abraham Lincoln. Douglas had previously defeated Lincoln in a dispute in the Senate, known for the famous Lincoln-Douglas debates of 1858.
9- P.G.T. Beauregard was an American military officer, major general in the Confederate Army during the Civil War. He was the first major Confederate general, touching him commanding the defense of Charleston, South Carolina, in the Battle of Fort Sumter.
10- Andrew Johnson was the 17th President of the United States, occupying the post from 1865 to 1869 given the assassination of Abraham Lincoln, of whom he had been vice president. Since the Civil War had ended shortly before his presidency, Johnson was concerned to begin with the Reconstruction of states that had separated from the Union, but found opposition from the Republican majority in Congress and faced an impeachment process.
11- John Brown was a famous American abolitionist, who believed in armed insurrection as the only way to overthrow slavery in the United States. On October 16, 1859, supported by abolitionists of the North, he took the federal arsenal of Harpers Ferry, Virginia. His group was surrounded by an Army company under the command of Colonel Robert E. Lee. He was arrested and charged with treason and murder, being executed on December 2, 1859, in Charles Town, Virginia.
12 - Thomas "Stonewall" Jackson was a well-known Confederate general during the Civil War. On May 2, 1863, during the victorious Battle of Chancellorsville, Jackson went on a night reconnaissance mission and was shot by his own men, who because of the darkness did not recognize him.