Expansion. Battles with Indian nations. The War of 1812. Welcome to America under Republican rule at the onset of the 19th century.
The United States underwent dramatic changes during the period of Democratic-Republican (also called Jeffersonian Republican, or simply Republican) political leadership in the first decades of the 19th century. The republic's expansion to the west and renewed military conflict with Indian nations and Great Britain each posed a fundamental challenge to the fragile new republic. All three of these factors played a role in the coming of the War of 1812.
Although the war itself had no decisive outcome, it did serve as a turning point in the history of the young republic. The United States survived a second war with its former colonial ruler and in the process called forth a national effort that helped Americans from distinct regions pull closer together. The war years also led to the final disintegration of the Federalists, whose strength in New England, which, to many, indicated a regional loyalty in conflict with national sentiments given new importance by the war.
The United States developed in a more distinctly American fashion after the War of 1812. The years of the early republic, from the end of the Revolutionary war in 1783 to the end of what is sometimes called the Second War for American Independence in 1815, had itself been a period of enormous change that included dramatic political innovations of state and federal constitutions as well as the surge of western settlement.
America was growing up.