Sectionalism and Manifest Destiny After Jackson was the president, Jackson was the main reason for The Trail of Tears. But during the presidency, he was responsible for the Indian removal act. Before Jackson became president he was a general for the Battle of New Orleans.The last battle of the War of 1812, was the general who defeated the British in 1815. There were many events during the 19th century that both pulled the nation together and apart. For example, some of the events that pulled the U.S. together were things like the war of 1812, the Battle of New Orleans, and the Battle of Alamo, Samuel Morse Patented the telegraph, Texas Admitted into the Union. Things that pulled them apart, just like