The battle of Cambrai came to an end on 7 December, and the Western Front was then otherwise “quiet.” On the same day the US Battleship Division 9, commanded by Rear Admiral Hugh Rodman, reached the Grand Fleet anchorage at Scapa Flow, adding four American dreadnaughts to the fleet. America at first resisted dividing its fleet, but First Sea Lord Jellicoe (who would resign on the 26th) convinced the American admirals by revealing in April the massive losses in merchant shipping in 1917 – 600,000 tons per month – which would lead to starvation in Britain by the end of the year. The British requested older coal burning ships because of the shortages of oil, and the Americans sent the Delaware, Florida, New York and Wyoming.
Off in the east Russia was making its peace with the Central Powers. On 5 December a Russian delegation signed a general truce with the Central Powers at the fortress of Brest-Litovsk (the rest of city was in ruins) in Belarus and began negotiations for an armistice. The Soviet team was a motley crew, inasmuch as it involved representatives of all the social groups supporting the Revolution (soldiers, sailors, workers, etc. – a peasant was recruited off the street at the last minute), but two Bolshevik luminaries were present: Leon Trotsky (assassinated in August 1940) and Lev Kamenev (shot in August 1936).
The delegation was led by Adolph Joffe (committed suicide in November 1927 after being refused permission to travel abroad for medical treatment), an ally of Trotsky, and his position was soon improved by sending home many of the social group representatives, such as the sailors. On 15 December an armistice was signed, and on the 22nd negotiations for a peace treaty began, a much harder row to hoe for the Russians. They wanted no “annexations or indemnities,” but the Central Powers had territorial ambitions galore and non-Russian provinces were already opting out of the prostrate Russian Empire. Courland, Poland and Lithuania, already occupied by the Germans and Austrians, wanted independence, which Finland declared on 6 December; the Moldavian Democratic Republic (Bessarabia) was declared on the 15th. And proclaiming the principle of self-determination made it difficult for the Bolsheviks to argue against these developments.
Meanwhile, it was becoming clearer where the new Russian republic was heading. Back in July the Provisional Government had accepted the idea of Constituent Assembly, but Kerensky wanted to wait until the war, which he wished to continue, was over. The October Revolution (in November) changed that, inasmuch as the Bolsheviks demanded immediate peace, and elections were held in November. Unfortunately for Lenin, a split among his allies, the Social Revolutionaries, meant the Bolsheviks could be a minority in the Assembly, and it would not be convened until January.
To the south the British outside Jerusalem were fending off Turkish counterattacks at the beginning of December, and on the evening of 8 December the Ottoman Seventh Army moved north, evacuating Jerusalem but for a small force on the Mount of Olives. The next day British units entered the city, which surrendered, and the Turks on the Mount were defeated. On 11 December Allenby entered the city through the Jaffa Gate, on foot in order to show respect for the holy places. From the 26th to the 30th the Turks, reinforced by units from further east (which would make Baghdad easier to capture), attacked the British positions but were repulsed.
On 17 December London gave assurances to Hussein bin Ali, the self-proclaimed King of Hejaz, concerning the independence of the Arabs following the war. This assurance was, however, in direct contradiction to the Sykes-Picot agreement of 1916, which handed the areas outside the Arabian Peninsula to the British and the French, and on 23 November the Bolsheviks had published the text of Sykes-Picot and other secret treaties (pretty much the only cool thing they would ever do). Ah, perfidious Albion.
The odds and ends of December: on 7 December the American Congress, possibly in response to Caporetto, declared war on Austria-Hungary, followed by Panama on the 10th, which surely convinced the Austrians that they were doomed. And on 1 December the last German troops were squeezed out of German East Africa, but Lettow-Vorbeck would carry on the war in Portuguese Mozambique.
And still the war went on.