"Moreover, the Whites had foreign support. The Czech Legion had been formed by Czech and Slovak nationalists to fight on the Russian side against Austria-Hungary and at the outbreak of the Revolution numbered around 35,000 men. Determined to continue their fight for independence, the Legion's commanders decided to travel eastwards, along the Trans-Siberian Railway, with a view to crossing the Pacific, North America and the Atlantic and rejoining the fray on the Western Front. They took around 15,000 men with them. When the Bolsheviks at Chelyabinsk sought to disarm them the Czechs fought back. They then joined forces with the Socialist Revolutionaries in Samara, helping them to establish a Committee of Members of the Constituent Assembly (known as the Komuch) as a rival government to Lenin's. Between May and June, the Czechs swept eastwards, capturing Novo-Nikolaevsk, Penza, Syzran, Tomsk, Omsk, Samara and finally Vladivostok. Meanwhile, Russia's former allies sent expeditionary forces, whose primary aim was to keep Russia in the war. The British landed troops at Archangel and Murmansk, as well as at Vladivostok; the French sent men to Odessa, the Americans to Vladivostok. The Allies also supplied the White armies with weapons and other supplies. The Japanese seized the opportunity to march across the Amur River from Manchuria. Meanwhile, the cities that were supposed to be the headquarters of the Revolution emptied as factories closed and supplies of food and fuel dried up. When Denikin called on all the White forces to converge on Moscow in July 1918, it seemed more than likely that the Bolshevik regime would be overthrown."