Answer:
The hard times that swept over the Continent in the late 1840s transformed widespread popular discontent in the German Confederation into a full-blown revolution. After the middle of the decade, a severe economic depression halted industrial expansion and aggravated urban unemployment. At the same time, serious crop failures led to a major famine in the area from Ireland to Russian Poland. In the German states, the hungry 1840s drove the lower classes, which had long been suffering from the economic effects of industrial and agricultural rationalization, to the point of open rebellion. There were sporadic hunger riots and violent disturbances in several of the states, but the signal for a concerted uprising did not come until early in 1848 with the exciting news that the regime of the bourgeois king Louis-Philippe had been overthrown by an insurrection in Paris (February 22–24). The result was a series of sympathetic revolutions against the governments of the German Confederation, most of them mild but a few, as in the case of the fighting in Berlin, bitter and bloody.
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