CASUALTY RECORD // April 9, 1940
Battle of Drøbak Sound
Estimated casualties — killed, wounded, captured, and missing — by side, with confidence labels per surviving record.
Casualties by side
1 sides catalogued · combined 1,000 estimated
Germany
1,000
Medium-confidence figure
Battle context
The Battle of Drøbak Sound took place at the narrowest point of the outer Oslofjord on 9 April 1940, when a Norwegian garrison of 293 men engaged a German naval force. German casualties reached approximately 1,000, making it a costly check for the invading force. The engagement is notable as a moment of determined resistance by a small defending force against a substantially larger attacker. According to the overview, the battle marked the end of the 'Phoney War' and the beginning of active World War II combat in Western Europe, placing Drøbak Sound at the opening of the broader German campaign in the West.
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