what major wars fought by europeans from 1850 to outbreak of world war I?

Answer 1

Franco-Prussian War of 1870 was one

Answer 2

1839 - 1842 First Anglo-Afghan War
1848 - 1849 Hungarian Revolt of 1848 waged by Hungary against Austria and later Russia
1848 - 1851 First war of Schleswig
1850 - 1865 Taiping Rebellion
1854 - 1856 Crimean War.
1859 - 1860 Italian Independence War
1864 Second war of Schleswig
1866 Austro-Prussian War (aka Seven Weeks War)
1870 - 1871 Franco-Prussian War
1877 - 1878 Russo-Turkish War, 1877-78
1839 - 1842 Second Anglo-Afghan War
1887 - 1889 Italo-Abyssinian War
1895 - 1896 First Italo-Abyssinian War
1894 - 1895 First Sino-Japanese War
1898 Spanish-American War
1899 - 1902 Boer War in South Africa


World War 1 era.

1905 Russo-Japanese War
1912 - 1913 Two Balkan Wars are fought for control of European territories of Ottoman Empire 1914 - 1918 World War I, initially in Europe, then worldwide
1917 - 1918 Russian Revolution
1918 Finnish Civil War, fought between "the reds" (rebellious Socialists) and "the whites" (anti-Socialists) in the aftermath of the Russian Revolutions of 1917. Germany intervened on the side of the Whites.
1918 - 1922 Russian Civil War, fought between "the reds" (Communists) and "the whites" (tsarists) directly after the Bolshevist Revolution. US, France and Great Britain also intervened to "kill communism in the crib."
1918 - 1920 Estonian Liberation War, Estonia against Soviet Russia and the Germans.
1918 Polish-Czech war in Teschen Silesia
1918 - 1919 Poland and Lwow against Westukrainian Republic
1918 - 1919 Great Poland Uprising, Provinz Posen against Germany
1919 Third Anglo-Afghan War