A British Ship of the Line was a powerful warship used by the Royal Navy from the 17th to the mid-19th centuries. These ships were designed for naval battles and typically carried a large number of cannons on multiple decks. They played a crucial role in establishing British naval dominance during conflicts such as the Napoleonic Wars. These vessels were built to engage enemy ships in line formations, allowing them to maximize their firepower. The term "line of battle" refers to the tactic of ships sailing in a single line to deliver broadside attacks. The most famous example of a British Ship of the Line is the HMS Victory, which served during the Battle of Trafalgar.