1914 encounter between the German Kaiserliche Marine and the British Royal Navy early in the First World War.
A surprise German naval attack sank HMS Pegasus at Zanzibar harbour, demonstrating early WWI vulnerability of British colonial naval assets.
Key Facts
- Date
- 20 September 1914
- British ship sunk
- HMS Pegasus
- German ship
- SMS Königsberg
- British crew killed
- 38 dead
- German commander
- Commander Max Looff
- Outcome
- Decisive German victory; HMS Pegasus sunk
Location
Cause → Event → Consequence
SMS Königsberg, coaling in the Rufiji River delta, received intelligence that HMS Pegasus — a British cruiser sent to counter Königsberg — had docked at Zanzibar for repairs. Recognising the opportunity to destroy a vulnerable opponent in port, Königsberg's captain, Commander Max Looff, resolved to attack before Pegasus could be made ready for action.
On 20 September 1914, Königsberg sailed past the picket ship HMS Helmuth at Zanzibar harbour's entrance without raising the alarm. Opening fire on the unprepared Pegasus, Königsberg inflicted severe damage before the British crew could respond. Because Königsberg's guns outranged those of Pegasus, the British vessel could not effectively return fire, leaving the engagement entirely one-sided.
HMS Pegasus sank later on 20 September 1914, with 38 crew members killed. The engagement highlighted the danger posed by SMS Königsberg to British naval operations in the Indian Ocean and East African waters, and intensified Royal Navy efforts to locate and neutralise Königsberg, eventually culminating in the ship being cornered in the Rufiji River delta.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Commander Max Looff.
Side B
1 belligerent