The Embargo Act of 1807 was a general trade embargo on all foreign nations that was enacted by the United States Congress. Much broader than the ineffectual 1806 Non-importation Act, it represented an escalation of attempts to coerce Britain and France to cease their interference with American merchant shipping as the Napoleonic Wars continued. In the first decade of the 19th century, American shipping grew. During the Napoleonic Wars, British and French authorities seized American merchantmen trading with the other side. American merchantmen bound for trade with "enemy nations" were seized as contraband of war by both European powers. The Royal Navy, angered by thousands of its sailors deserting and finding work on American merchantmen, began stopping US ships and reclaiming alleged deserters. This inflamed American public opinion, which was exacerbated by incidents such as the Chesapeake–Leopard affair.