18th and Early 19th Century Timeline By DillonBean3 Period: Jan 3, 1798 to Jan 3, 1833 Romanticism Jul 4, 1803 Louisiana Purchase The U.S. purchased the Louisiana Territory from France. Jun 18, 1812 Battle of 1812 United States delcared war with Great Britian. Mar 12, 1818 Mary Shelley Mary Wollstonecraft Shelley published Frankenstein, also known as the Modern Prometheus.
