20th July 1915
Submarine U-23 is sunk
U-boat SM U-23 was launched in April 1913 and served in the Imperial German Navy in the First World War, where it took part in the First Battle of the Atlantic, a prolonged engagement between the German and Allied navies around the British Isles, North Sea and French coast.
Although her crew was successful in sinking seven Allied vessels in less than two years (five British, one Norwegian and one Danish), she was torpedoed off Fair Isle on 20 July 1915, and sank with the loss of 24 lives. Ten of her crew survived.
Other events that occured in July
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