November 26

HMS Bulwark blows up in Sheerness Harbour. The explosion is heard over 20 miles away in Whitstable, Southend-on-Sea and Westcliff-on-Sea.

Out of the ship's complement of 750 men, 14 are recovered alive, but two later died from their injuries. At the subsequent inquest, it was stated there was no evidence to suggest the source of the explosion was external, nor was there any evidence of sabotage.

The pre-dreadnought battleship was part of the 5th Battle Squadron which had transferred to Sheerness on 14 November to guard against a possible German invasion of south-east England.

The German submarine U21 sinks the British collier SS Primo near Le Havre.

November 23

The German submarine U18 penetrates the fleet defences at Scapa Flow by following a steamer through the boom and entering the anchorage. The fleet is not at Scapa Flow, but is dispersed in anchorages on the west coast of Scotland and Ireland. As the submarine attempts to leave, its periscope is spotted. The trawler Dorothy Gray alters course and rams the periscope, rendering it unserviceable. The submarine's diving plane motor fails, and U18 is unable to maintain depth. The submarine is rammed a second time by the Dorothy Gray and is forced to surface. Its captain scuttles U18, and all its crew except one are picked up by British boats.

The British steamer SS Malachite on a voyage from Liverpool to Le Havre is sunk off Le Havre by the German submarine U21.

September 5 - Battle of the Marne begins

The Battle of the Marne begins. It is the culmination of the German advance into Northern France and its pursuit of the Allied armies which followed the Battle of the Frontiers in August.

The Battle of the Marne: Positions on 5 September

HMS Pathfinder

HMS Pathfinder is the first British warship to be sunk by a submarine off the Firth of Forth.

The 26th Brigade, RFA marches to Nesle.