Lusitania was built to be the fastest and most luxurious ship afloat. Designed by Leonard Peskett and constructed by John Brown and Company on Clydebank, she was launched on 7 June 1906 and briefly held the title of world's largest passenger ship until her sister, Mauretania, entered service three months later. The British Admiralty subsidized both ships under a 1903 agreement: a 2.6-million-pound loan at a favourable interest rate, plus annual operating subsidies, in exchange for vessels built to Admiralty specifications that could serve as armed merchant cruisers in wartime. In 1907, Lusitania claimed the Blue Riband for the fastest Atlantic crossing, breaking a decade of German dominance. Her four steam turbines could sustain 25 knots. Her interiors were extraordinary -- a two-deck first-class dining saloon crowned by an elaborate dome, marble fireplaces, a Georgian-style lounge with stained glass representing each month of the year, and third-class accommodation so comfortable that emigrants preferred her over any competitor.

When war began in August 1914, the Admiralty initially requisitioned Lusitania for conversion to an armed cruiser, then released her -- the ship consumed too much fuel to be practical, and guns were scarce. She continued transatlantic passenger service, occasionally carrying war materials in her cargo. To economize, Cunard shut down her Number 4 boiler room, reducing maximum speed from over 25 knots to 21. Her wartime paint scheme was dropped and she returned to civilian colours, gold name picked out at the bow, Cunard livery on the funnels. There was no realistic hope of disguise -- her four-funnelled silhouette was one of the most recognizable in the world. Captain William Thomas Turner, a veteran who had commanded Lusitania, Mauretania, and Aquitania, took the bridge for her final voyages.

Lusitania was running parallel to the south Irish coast on 7 May 1915, roughly 11 miles off the Old Head of Kinsale, when she crossed in front of U-20, commanded by Walther Schwieger. The torpedo struck behind the bridge on the starboard side. Moments later, a second explosion ripped through the hull. The ship took on a severe starboard list almost immediately, making it nearly impossible to launch lifeboats -- only six of 48 were successfully lowered. Several others overturned or broke apart. Within eighteen minutes, the ship had sunk, her funnels and masts the last to disappear. In the hours that followed, Irish fishermen and rescuers who had heard the distress signals performed acts of extraordinary courage, pulling survivors from the cold water. The final count: 767 survivors, four of whom later died from injuries. The rest -- 1,198 men, women, and children -- were lost.

The aftermath was explosive in every sense. Lusitania's cargo manifest listed 4.2 million rounds of rifle cartridges, 1,250 empty shell cases, and 18 cases of non-explosive fuses. Days after the sinking, Cunard delivered a supplementary manifest revealing that the "empty shells" were in fact 1,248 boxes of filled three-inch shells -- 50 tonnes of live ammunition. Germany argued the ship was a legitimate military target. The United States, under President Wilson, demanded an apology, compensation, and a promise to avoid similar incidents. Secretary of State William Jennings Bryan resigned, believing Wilson's stance compromised American neutrality. Germany eventually issued secret orders in June 1915 to cease unrestricted attacks on passenger liners, but the damage to public opinion was irreparable. When Germany resumed unrestricted submarine warfare in January 1917, the memory of Lusitania was central to Congress's decision to declare war that April.

The wreck was discovered in October 1935, lying on her starboard side in roughly 305 feet of water, 11 miles south of Kinsale. She has deteriorated far faster than Titanic, battered by shallow-water currents, fishing nets, and depth charges. American venture capitalist Gregg Bemis bought the wreck in the 1960s and spent decades -- and millions of dollars -- trying to prove that the British government had deliberately placed the ship in harm's way. In 1993, Robert Ballard explored the wreck and concluded that a coal dust explosion, not contraband munitions, caused the fatal second blast. Bemis rejected those findings. The Irish government declared Lusitania a heritage site in 1995, complicating further salvage. Bemis died in 2020 without proving his theory. The wreck, now owned by a museum in Kinsale, continues to collapse. Divers still attempt the dangerous descent, navigating unexploded ordnance, fishing nets, and limited visibility. What the Atlantic claimed in eighteen minutes, it is still slowly consuming.