The American Revolution (1775-1783) was the first major conflict between the United States and Great Britain. The war resulted in the United States gaining its independence from Great Britain, as well as control over the territory east of the Mississippi River and south of Canada.
The War of 1812 (1812-1815) was the second major conflict between the United States and Great Britain. The war was fought over several issues, including the British impressment of American sailors, the British support of Native American tribes who were resisting American expansion, and the British restrictions on American trade. The war ended in a stalemate, with neither side gaining a clear victory. However, the war did result in the United States gaining control over the Great Lakes region and the Northwest Territory.
Conflicts with Spain
The Spanish-American War (1898) was the third major conflict between the United States and Spain. The war was fought over several issues, including the Spanish oppression of Cuban rebels, the Spanish destruction of the USS Maine, and the Spanish refusal to sell the Philippines to the United States. The war ended in a decisive American victory, with the United States gaining control over Cuba, Puerto Rico, Guam, and the Philippines.
These conflicts had a significant impact on the borders of the United States. The American Revolution established the United States as an independent nation, and the War of 1812 secured the country's northern border. The Spanish-American War gave the United States control over several overseas territories, including Cuba, Puerto Rico, Guam, and the Philippines. These territories played an important role in the United States' rise to world power.