British Empire The
British Army deployed 1,800 troops to Siberia in two battalions. The troops came from the 1/9th (
Cyclist) Battalion,
Hampshire Regiment (deployed from India) and the 25th Battalion,
Middlesex Regiment (deployed from Hong Kong and Singapore). The Middlesex battalion was the first Allied force to land in Vladivostok on 3 August 1918 The battalion was commanded by the trade unionist and Liberal Member of Parliament
John Ward. The British also sent a military mission of 500 men to Siberia, made up of 250 officers and 250
non-commissioned officers, who took part in the training and equipping of the White forces. The military mission was commanded by General
Alfred Knox. At least 64
Royal Marines and sailors from
HMS Suffolk were also involved of the manning of guns of armoured trains at the front in Siberia.
Canada The Canadian Siberian Expeditionary Force, authorised in August 1918 and commanded by Major General
James H. Elmsley, was sent to Vladivostok to bolster the Allied presence there. Composed of 4,192 soldiers, the force arrived in Vladivostok on 26 October 1918 but returned to Canada between April and June 1919. During this time, the Canadians saw little fighting, with fewer than 100 troops proceeding "up country" to
Omsk, to serve as administrative staff for 1,800 British troops aiding the White Russian government of Admiral
Alexander Kolchak. Most Canadians remained in Vladivostok, undertaking routine drill and policing duties in the volatile port city.
China At the request of Chinese merchants, 2,300 Chinese troops were sent to Vladivostok to protect Chinese interests there. The Chinese army fought against both Bolsheviks and Cossacks.
Italy The "Corpo di Spedizione Italiano in Estremo Oriente" was made of
Alpini troops, supported by 2,500 Italian ex-POWs who had fought in the Austro-Hungarian Army and enrolled in the
Legione Redenta. The Italians played a small but important role during the intervention, fighting together with the
Czechoslovak Legion and other allied forces using heavily armed and
armoured trains to control large sections of the Siberian railway. The main areas of operation were the
Irkutsk,
Harbin and
Vladivostok regions.
France The French sent a small, token, 500-strong force to Vladivostok in August 1918. This was a colonial regiment from Indo-China. This composite force was known as the
Bataillon colonial sibérien.
Japan The Japanese were initially asked in 1917 by the French to intervene in Russia but declined the request. However, the army general staff later came to view the Tsarist collapse as an opportunity to free Japan from any future threat from Russia by detaching Siberia and forming an independent buffer state. The Japanese government at first refused to undertake such an expedition and it was not until the following year that events were set in motion that led to a change in this policy. In July 1918, President Wilson asked the Japanese government to supply 7,000 troops as part of an international coalition of 25,000 troops, including an
American expeditionary force, planned to support the rescue of the Czechoslovak Legions and securing the Allied war
matériel stockpiles. After heated debate in the
Diet, the administration of
Prime Minister Terauchi Masatake agreed to send 12,000 troops, but under solely Japanese command, independent of the international coalition. Once the political decision had been reached, the
Imperial Japanese Army took over full control under Chief of Staff
Yui Mitsue and extensive planning for the expedition was conducted. The Japanese first started landing troops in Vladivostok on a large scale on 8 August 1918, and by the end of the month 18,000 Japanese troops had arrived at the port with a further 6,000 moved up through
Manchuria to
Manzhouli. On 18 August the Japanese General
Otani Kikuzo assumed command of all the Allied forces.
United States The American Expeditionary Force, Siberia was commanded by Major General
William S. Graves and eventually totalled 8,763 officers and enlisted men. The AEF Siberia included the US Army's
27th and
31st Infantry Regiments, plus large numbers of volunteers from the
13th and
62nd Infantry Regiments along with a few from the
12th Infantry Regiment. Set up to operate the
Trans-Siberian railroad, the
Russian Railway Service Corps was formed of US personnel. Although General Graves did not arrive in Siberia until September 4, 1918, the first 3,000 American troops disembarked in Vladivostok between August 15 and August 21, 1918. They were quickly assigned guard duty along segments of the railway between Vladivostok and
Nikolsk-Ussuriski in the north. Unlike his Allied counterparts, General Graves considered his mission in Siberia to be to provide protection for American-supplied property and to help the Czechoslovak Legions evacuate Russia, and that it did not include fighting against the Bolsheviks. Repeatedly calling for restraint, Graves was often at odds with commanders of
British,
French and
Japanese forces who wanted the Americans to take a more active part in the military intervention in Siberia.
Others Small detachments of
Poles,
Serbs, and
Romanians were also sent to Vladivostok between August–September 1918. ==Allied intervention (1918–1919)==