—— In the early 1800s, the Northern states turned from farming to manufacturing. Black slavery soon disappeared in the North. But things were different in the South. The South expanded both its agriculture and its slavery. The problem of slavery became a serous political issue. The abolitionists tried to abolish slavery while the South tried to keep it. When Abraham Lincoln was elected President, the Southern states broke away and formed a new nation. Then Lincoln was determined to maintain the Union and the war broke out on April 12, 1861, Lincoln realized that he could win support for the Union at home and abroad by making the war a just war against slavery. So he issued Emancipation Proclamation. Thus England and France stood by the Union’s side. Many black slaves joined the Union Army. After a series of battles, Robert Lee could no longer hold Richmond. He surrendered on April 9, 1865. The Civil War ended.