Like many other Allied countries after WW1, France was involved in invasions on then-Russian soil to help overthrow the Bolsheviks in 1919.
Allied intervention in the Russian Civil War - Wikipedia
On 18 December 1918, a month after the armistice, the French landed in Odessa and Sevastopol. In Odessa, a 7-hour battle ensued between the French and the forces of the Ukrainian People's Republic before they gained full control of the city. The landings began the intervention in southern Russia (later Ukraine) which was to aid and supply General Denikin's White Army forces, the Volunteer Army, fighting the Bolsheviks there. The campaign involved mainly French, Greek and Polish troops. The morale of the French troops and the sailors of their fleet in the Black Sea was always low, and most wanted to be demobilised and sent home. The morale of the Greek and Polish interventionist forces was no better. A local warlord, Otaman Nykyfor Hryhoriv, aligned himself with the Bolsheviks on 18 February 1919 and advanced his army against the foreign invaders. With his army of 10–12,000 men, he first attacked allied-held Kherson on 2 March which was occupied by just 150 French, 700 Greek and a few hundred Volunteers of questionable reliability. After heavy fighting, the city was taken on 9 March. The French lost 4 killed and 22 wounded, while the Greeks had some 250 casualties. Local Greek residents were also killed in the aftermath. After the conquest of Kherson, Hryhoriv turned his forces against Nikolaev, where there were even less allied troops present. There were still 12,000 well equipped German troops in the city, but they had no intention to participate in the fighting. The local French commander was allowed to negotiate a truce with Hryhoriv, and on 14–16 March all allied and German troops were evacuated by sea without any fighting, leaving considerable quantities of war material behind.
By April 1919, the troops were withdrawn from Odessa after further threats from Nykyfor Hryhoriv's Army, before the defeat of the White Army's march against Moscow. A major mutiny amongst French sailors on the Black Sea had in part necessitated the withdrawal. Some British sailors dispatched to the Black Sea had also mutinied. The last Allied troops left Crimea on 29 April 1919.