Roosevelt earned the Nobel Peace Prize for his effort. George E. Mowry concludes that Roosevelt handled the arbitration well, doing an "excellent job of balancing Russian and Japanese power in the Orient, where the supremacy of either constituted a threat to growing America". As Japan had won every battle on land and sea and as the Japanese people did not understand that the costs of the war had pushed their nation to the verge of bankruptcy, the Japanese public was enraged by the Treaty of Portsmouth as many Japanese had expected the war to end with Russia ceding the Russian Far East to Japan and for Russia to pay an indemnity. The United States was widely blamed in Japan for the Treaty of Portsmouth with Roosevelt having allegedly "cheated" Japan out of its rightful claims at the peace conference. On 5 September 1905 the Hibiya incendiary incident as the anti-American riots were euphemistically described erupted in Tokyo, and lasted for three days, forcing the government to declare martial law.