Why did Ivan Turgenev move to Paris after the Franco-German War?

Ivan Turgenev moved to Paris following the Franco-German War (1870–1871) primarily because the Viardot family, with whom he resided in Baden-Baden, Germany, was forced to leave the country due to the conflict. Turgenev followed them, relocating first to London and subsequently settling in Paris.1

During this period, Turgenev became a prominent figure in the French literary scene, serving as an ambassador of Russian culture and maintaining close associations with notable contemporaries such as Gustave Flaubert, George Sand, and Émile Zola.1