In May 1917, large parts of the Latvian regiments transferred their loyalty to the Bolsheviks. They became known as
Red Latvian Riflemen (, ) and actively participated in the
Russian Civil War. The Riflemen took an active part in the suppression of
anti-Bolshevik uprisings in
Moscow (
Left SR uprising) and
Yaroslavl (
Yaroslavl Uprising) in 1918, and fought against the forces of the
White Generals
Denikin,
Yudenich, and
Wrangel. After victory in the
Oryol-Kromy operation against Denikin in October 1919, a division of Latvian Riflemen received the highest military recognition of that time: the
Honorable Red Flag of VTsIK.
Jukums Vācietis, formerly a colonel in the Latvian Rifles became the first commander-in-chief of the
Red Army. The Latvian Red Riflemen were instrumental in the attempt to establish
Soviet rule in Latvia in 1919. They suffered great losses of personnel due to the decreasing popularity of Bolshevik ideas among the Latvian Riflemen and Latvians generally, and the majority were re-deployed to other fronts of the Russian Civil War. The remaining forces of the Red Army in Latvia were defeated by
Baltic German volunteers under General
von der Goltz and newly formed Latvian units initially under
Colonel Kalpaks and later under Colonel
Jānis Balodis, who were loyal to the Latvian Republic in western Latvia; by the
Estonian Army including the , and finally by a
joint campaign of the Polish and new Latvian army in Latgale, south-eastern Latvia. Following the 1920
peace treaty between Latvia and
Bolshevik Russia, 11,395 former Red Riflemen returned to Latvia. Other former Riflemen remained in Soviet Russia and rose to leadership positions in the Red Army,
Communist Party, and
Cheka. When the
USSR occupied Latvia in 1940, many of the surviving Red Riflemen returned to Latvia. The most famous pre-World War II Soviet Communist leaders from Latvia were all former Latvian Riflemen:
Martin Latsis,
Jēkabs Peterss,
Arvīds Pelše,
Yan Karlovich Berzin,
Yan Rudzutak,
Pēteris Stučka,
Robert Eikhe. All of them, except for Stučka (who died in 1932) and Pelše, were later executed in the so-called
Latvian Operation of the NKVD during the
Great Purge in 1938. ==White Latvian Riflemen==