more democratic with the abolishment of property requirements in voting, although voting remained restricted to white males. By the mid-19th century, the most important issue was slavery. The Northern states generally had outlawed the practice, while the Southern states not only had kept it legal but came to feel it was essential to their way of life. As new states joined the union, lawmakers clashed over whether they should be slave states or free states. In 1860, the anti-slavery candidate Abraham Lincoln was elected president. Fearing he would try to outlaw slavery in the whole country, several southern states seceded, forming the Confederate States of America, electing their own president and raising their own army. Lincoln countered that secession was illegal and raised an army to crush the rebel government, thus the advent of the American Civil War (1861–65). The Confederates had a skilled military that even succeeded in invading the northern state of Pennsylvania. However, the war began to turn around, with the defeat of Confederates at Gettysburg, Pennsylvania, and at Vicksburg, which gave the Union control of the important Mississippi River. Union forces invaded deep into the South, and the Confederacy's greatest general, Robert E. Lee, surrendered to Ulysses S. Grant of the Union in 1865. After that, the south came under Union occupation, ending the American Civil War. Lincoln was tragically assassinated in 1865, but his dream of ending slavery, exhibited in the wartime Emancipation Proclamation, was carried out by his Republican Party, which outlawed slavery, granted blacks equality and black males voting rights via constitutional amendments. However, although the abolishment of slavery would not be challenged, equal treatment for blacks would be. The Gettysburg Address, Lincoln's most famous speech and one of the most quoted political speeches in United States history, was delivered at the dedication of the Soldiers' National Cemetery in Gettysburg, Pennsylvania on 19 November 1863, during the Civil War, four and a half months after the Battle of Gettysburg. Describing America as a "nation conceived in Liberty and dedicated to the proposition that all men are created equal", Lincoln famously called on those gathered: Continental Europe: 1815–1870 The years following the Napoleonic Wars were a time of change in Europe. The Industrial Revolution, nationalism, and several political revolutions transformed the continent. Industrial technology was imported from Britain. The first lands affected by this were France, the Low Countries, and western Germany. Eventually the