Action of 22 September 1914
The Action of 22 September 1914 was an attack by the German U-boat U-9 that took place during the First World War. Three obsolete Royal Navy cruisers of the 7th Cruiser Squadron manned mainly by Royal Naval Reserve part-timers and sometimes referred to as the Live Bait Squadron, were sunk by U-9 while patrolling the southern North Sea.
Source: Wikipedia — Action of 22 September 1914 (CC BY-SA 4.0)