Revolutions of 1848 in the Austrian Empire a common enemy. Previously, national identity allowed Habsburg forces to conquer revolutionary governments by playing them off one another. New democratic initiatives in Italy in the spring of 1848 led to a renewed conflict with Austrian forces in the provinces of Lombardy and Venetia. At the very first anniversary of the first barricades in Vienna, German and Czech democrats in Bohemia agreed to put mutual hostilities aside and work together on revolutionary planning. Hungarians faced the greatest challenge of overcoming the divisions of the previous year, as the fighting there had been the most bitter. Despite this, the Hungarian government
Diseases and epidemics of the 19th century 1854, it entered Venezuela; Brazil also suffered in 1855. The fourth cholera pandemic (1863–1875) spread mostly in Europe and Africa. At least 30,000 of the 90,000 Mecca pilgrims died from the disease. Cholera ravaged northern Africa in 1865 and southeastward to Zanzibar, killing 70,000 in 1869–70. Cholera claimed 90,000 lives in Russia in 1866. The epidemic of cholera that spread with the Austro-Prussian War (1866) is estimated to have taken 165,000 lives in the Austrian Empire. In 1867, 113,000 lost their lives to cholera in Italy. and 80,000 in Algeria. Outbreaks in North America in 1866–1873 killed some 50,000 Americans.