HMSAgamemnon was one of two Lord Nelson-class pre-dreadnought battleships launched in 1906 and completed in 1908. She was the Royal Navy's second-to-last pre-dreadnought battleship to be built, followed by her sister ship, Lord Nelson.
HMSAgamemnon was a 64-gun third-rate ship of the line of the British Royal Navy. She saw service in the American Revolutionary War, French Revolutionary, and Napoleonic Wars and fought in many major naval battles.