What important events happened during the classical period in the US?

During the classical period in the United States, roughly from the late 18th to the mid-19th century, several significant events occurred. The American Revolution (1775-1783) established independence from Britain, leading to the creation of the U.S. Constitution in 1787, which laid the foundation for American governance. The War of 1812 (1812-1815) further solidified national identity, while the westward expansion and the concept of Manifest Destiny in the 1840s reshaped the nation's geography and Demographics. Additionally, the issue of slavery intensified, setting the stage for future conflicts.