The retreat began after the heavy defeats of the White Army in the Omsk operation and in the
Novonikolaevsk Operation in November–December 1919. The army, led by General Kappel, retreated along the Trans-Siberian Railway, using the available trains to transport the wounded. They were followed on their heels by the
5th Red Army under the command of
Genrich Eiche. The White retreat was complicated by numerous insurgencies in the cities where they had to pass and attacks by partisan detachments, and was further aggravated by the fierce Siberian frost. After the series of defeats, the White troops were in a demoralized state, centralized supply was paralyzed, replenishment not received, and discipline dropped dramatically. In these circumstances, the appointment as commander of the Army of
General Kappel, who enjoyed unlimited trust and prestige amongst Kolchak's troops, was the first step to avoid the disintegration of the entire Kolchak army. Only the 2nd Army came under his command, as communication with the 1st and 3rd armies had been lost. Control of the railway was in the hands of the
Czechoslovak Legion, as a result of which parts of General Kappel's Army were deprived of the opportunity to use the railway. They were also harassed by partisan troops under command of
Alexander Kravchenko and
Peter Efimovich Schetinkin. The pursuing Red 5th Army took
Tomsk on 20 December 1919 and
Krasnoyarsk on 7 January 1920. == The march across Lake Baikal ==