The Dust Bowl, also known as the Dirty Thirties, was a period of severe dust storms that greatly damaged the ecology and agriculture of the US and Canadian prairies during the 1930s; severe drought and a failure to apply dryland farming methods to prevent wind erosion (the Aeolian processes) caused the phenomenon.
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Metternich urged conservative rulers to act decisively and crush the dangerous uprisings. In response, a French army marched over the Pyrenees to suppress a revolt in Spain. Austrian forces crossed the Alps to smash rebellious outbreaks in Italy.
