At the outset of the 19th century, Great Britain was locked in a long and bitter conflict with Napoleon Bonaparte’s France. In an attempt to cut off supplies from reaching the enemy, both sides attempted to block the United States from trading with the other. In 1807, Britain passed the Orders in Council, which required neutral countries to obtain a license from its authorities before trading with France or French colonies. The Royal Navy also outraged Americans by its practice of impressment, or removing seamen from U.S. merchant vessels and forcing them to serve on behalf of the British. In 1809, the U.S. Congress repealed Thomas Jefferson’s unpopular Embargo Act, which by restricting trade had hurt Americans more than either Britain or France. Its replacement, the Non-Intercourse Act, specifically prohibited trade with Britain and France. It also proved ineffective, and in turn was replaced with a May 1810 bill stating that if either power dropped trade restrictions against the United States, Congress would in turn resume non-intercourse with the opposing power. After Napoleon hinted he would stop restrictions, President James Madison blocked all trade with Britain that November. Meanwhile, new members of Congress elected that year–led by Henry Clay and John C. Calhoun–had begun to agitate for war, based on their indignation over British violations of maritime rights as well as Britain’s encouragement of Native American hostility against American expansion in the West.