By 1917, most Russians had lost faith in the leadership ability of Czar Nicholas II. Government corruption was rampant, the Russian economy remained backward, and Nicholas repeatedly dissolved the Duma, the Russian parliament established after the 1905 revolution, when it opposed his will. However, the immediate cause of the February Revolution–the first phase of the Russian Revolution of 1917–was Russia’s disastrous involvement in World War I (1914-18). Militarily, imperial Russia was no match for industrialized Germany, and Russian casualties were greater than those sustained by any nation in any previous war. Meanwhile, the economy was hopelessly disrupted by the costly war effort, and moderates joined Russian radical elements in calling for the overthrow of the czar.