factsmate.
◆ History · War & Conflict

A German U-boat sinks the liner Lusitania off Ireland

On this day · 7 May 1915
40 sec read

A single torpedo sent the Cunard liner down in 18 minutes, killing nearly 1,200 and hardening American opinion against Germany.

Verified · Imperial War Museums

On May 7, 1915, the German submarine U-20, commanded by Walther Schwieger, spotted the Cunard liner RMS Lusitania about 11 nautical miles off the Old Head of Kinsale, Ireland. At roughly 2:10 p.m. it fired a single torpedo into the ship’s starboard side.

A second, larger internal explosion followed, and the great liner listed badly. Only a handful of lifeboats got away cleanly. The Lusitania sank in just 18 minutes.

Eighteen minutes was all it took to send one of the world’s fastest liners to the bottom.

Of the nearly 2,000 people aboard, about 1,198 died, including 128 Americans. Germany argued the ship carried war munitions; the killing of civilians on a passenger liner nonetheless inflamed neutral opinion. The outrage helped pull the United States toward entering World War I, which it did in 1917.

18min
to sink
1,198
lives lost
128
Americans killed

Sources & references

2 references

Well-established. Corroborated by 2 independent sources.

1 Imperial War Museums Museum / research “RMS Lusitania was torpedoed by a German U-boat on 7 May 1915... It went under in 18 minutes, killing 1,200 of almost 2,000 passengers and crew on board.” iwm.org.uk ↗
2 U.S. National Archives government “On the morning of May 7, 1915, U-20, a German submarine, spotted the Lusitania off the Irish coast... 1,198 civilians died, including 128 Americans.” archives.gov ↗
✓ Last reviewed Jun 7, 2026

More like this