The action of 4 May 1917 was a naval and air engagement of the First World War in the North Sea. The action took place between the German Zeppelin LZ 92 (tactical name, L.43), several German submarines and a naval force led by the Australian light cruiser HMAS Sydney. The action was inconclusive with no casualties on either side, concluding when the Zeppelin had dropped all of its bombs and the cruisers had expended all of their anti-aircraft ammunition.
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