The outcome of the War of 1812, fought between the United States and Great Britain from 1812 to 1815, was largely a stalemate, ultimately resulting in the Treaty of Ghent, which restored pre-war boundaries without significant territorial changes. Both sides achieved some military victories, but neither could secure a decisive military advantage. The war fostered a sense of American nationalism, as the United States demonstrated its willingness to stand against British aggression, especially during the successful defense of Fort McHenry, which inspired the writing of "The Star-Spangled Banner." The war's aftermath also led to a decline in Federalist Party influence and laid groundwork for westward expansion.