From Ohio History Central
The War of 1812 was fought between the United States and Great Britain from 1812 until 1815.
The war had several causes. During the late 1700s and the early 1800s, Great Britain was at war with France. England began to face a shortage of skilled sailors. To acquire more men for its navy, Great Britain began to stop American and other ships and impress (take by force) sailors from them. England also tried to prevent United States farmers from trading with the French. Finally, British soldiers continued to occupy territory belonging to the United States, despite Great Britain's promise to remove these soldiers in the Treaty of Paris (1783) at the end of the American Revolution. Most of the soldiers were located along the Great Lakes, providing Indians, like the Shawnee leader Tecumseh, with support in their struggle against American settlers. In 1812, President James Madison asked the United States Congress to declare war.