RMS Lusitania was torpedoed by a German U-boat on 7 May 1915. The luxury passenger liner was crossing the Atlantic from New York to Liverpool when the German submarine U-20 fired without warning. After a second explosion – the cause of which is still debated – the ship quickly sank. It went under in 18 minutes, killing 1,200 of almost 2,000 passengers and crew on board.

On 4 February 1915, Germany declared a war zone around Britain in which any shipping – military or civilian – would be sunk on sight. During the early stages of the war, U-boats followed 'prize rules'. They would surface before attacking merchant ships, carry out formal searches of the cargo and allow time for passengers and crew to escape before the ship was sunk. Germany eventually abandoned prize rules and began its campaign of unrestricted submarine warfare, partially due to the British introduction of 'Q-Ships' – warships disguised as merchant ships.

ifebelt cork lifebelt (covered in yellow fabric) bearing the name, in black lettering, '*LUSITANIA*.
© IWM (MAR 127)
Lifebelt from the RMS Lusitania, torpedoed without warning and sunk by the German Submarine U20 on 7th May 1915.

The Lusitania was launched on 7 June 1906. It had been specially built to be easily converted to a warship and was registered with the British Admiralty as an armed auxiliary cruiser.

Following the outbreak of the First World War, it continued to operate as a passenger liner despite being used to carry British war materiel.

The sinking of RMS Lusitania caused international outrage and helped turn public opinion against Germany, particularly in the then-neutral United States. Of the 1,200 people killed, 128 were American citizens. But the incident did not immediately bring the United States into the war. Instead, the American government issued a severe protest to Germany.

Following immense pressure from the US and recognising the limited effectiveness of the policy, Germany abandoned unrestricted submarine warfare in September 1915.

British propaganda

A British propaganda poster portraying the sinking of the Lusitania as an act of German barbarism. The red title reads "Cold-Blooded Murder!"
Image: IWM (Art.IWM PST 11821)
A British propaganda poster portraying the sinking of the Lusitania as an act of German barbarism.

The Lusitania became a focus for British and American propaganda and was used to bolster recruitment efforts.

However, Germany claimed that the sinking was justified because munitions were being carried on board. In the days prior to the Lusitania's final voyage, the German embassy had also published warnings in American newspapers stating the dangers and risks of travelling through the war zone.

This British propaganda poster portrays the sinking of the Lusitania as an act of German barbarism.

Germany resumed its campaign of unrestricted submarine warfare in February 1917 after failing to take control of the sea at the Battle of Jutland the previous year. This, along with the interception of the Zimmerman telegram, brought the US into war against Germany on 6 April 1917.

Camisole worn by a survivor

Heavily stained white cotton and lace camisole with draw-string waist. The letter 'G' is embroidered on a tape attached to the garment.
© IWM (UNI 11978)
Camisole worn by Mrs Margaret Gwyer, a survivor of the sinking of the RMS Lusitania, which was torpedoed by the U20 on 7 May 1915.

This camisole worn by Mrs Margaret Gwyer, a survivor of the sinking of the RMS Lusitania, which was torpedoed by the U20 on 7 May 1915. 

Mrs Gwyer fell into the water from a lifeboat and was sucked into one of the sinking ship's funnels. However, the explosion of one of the ship's boilers blew her back to the surface, where she was picked up and later reunited with her husband. She kept the oil-stained camisole as a reminder of her ordeal.

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