Editing 31st Infantry Regiment (United States) (section)

==Russian Civil War==
During the Russian Revolution, on 13 August 1918, the 31st moved from Manila's tropics to the bitter cold of Siberia as part of the [[American Expeditionary Force, Siberia]]. Its mission was to prevent allied war material left on [[Vladivostok]]'s docks from being looted. The 31st moved from [[Fort William McKinley]] to [[Manila]], and there set sail for [[Vladivostok]], [[Siberia]], arriving on 21 August. The regiment was then broken into various detachments and used to guard the [[Trans-Siberian railway]], as well as 130&nbsp;km of a branch line leading to the [[Suchan mines]].

[[File:31st Infantry in the field near Vladivostok.jpg|thumb|31st Infantry in the field near Vladivostok as part of the American Expeditionary Force Siberia]]
For the next 2 years, the 31st and its sister, the [[27th Infantry Regiment (United States)|27th Infantry Regiment]], fought off bands of Red revolutionaries and White counterrevolutionaries that were plundering the Siberian countryside and trying to gain control of the Trans-Siberian Railroad. They also dissuaded their 40,000 Japanese allies from taking control of Russian territory.

The regiment suffered its first battle casualties on 29 August 1918, in action near [[Ugolnaya]]. During the Siberian deployment, 30 men of the 31st Infantry were killed, and some 60 men were wounded in action. In addition, a large number of troops lost limbs due to [[frostbite]]. During this deployment, the regiment recommended one [[Medal of Honor]] and 15 [[Distinguished Service Cross (United States)|Distinguished Service Cross]]es. For its service in Siberia, the 31st Infantry became known as "the Polar Bear regiment", adopting a silver polar bear as its insignia.