As Union Iron Works was located in San Francisco, California along America's West Coast, USS Oregon was conveniently assigned to the U.S. Pacific Squadron in the early going (the Panama Canal had yet to be built and thus transiting to Atlantic waters were quite a journey). As the political situation between Spain and the United States began to deteriorate, the vessel relocated to the American East Coast for the foreseeable future. With no convenient passage options available, Oregon rounded the South American southern coast to reach Atlantic waters, covering some 16,000 total miles during a journey spanning from March to May 1898. War with Spain formally began on April 25th, 1898.
As part of the Atlantic Squadron, USS Oregon was used to help blockade Santiago. On July 3rd, 1898, she supported American actions during the Battle of Santiago which resulted in a decisive U.S. victory as five battleships, an armored cruiser, and two militarized yachts of the USN tangled with four cruisers and a pair of destroyers from the Spanish Navy. American casualties numbered one dead and one wounded to Spain's 323 dead, 151 wounded, and 1,720 captured. During the fighting, Oregon's speed was put to good use alongside USS Brooklyn as they ran down the escaping Cristobal Colon - which was forced to surrender.
The war with Spain ended months later on August 12th, 1898 with an American victory (and the demise of the Spanish Empire) but spurred a new war in the Philippines. USS Oregon was stationed in Pacific waters once again and completed a one-year tour during the Philippine-American War (1899-1902). The war's results were quite the same as the Americans forced a Philippine surrender and became American territory for the foreseeable future. USS Oregon then stationed off Wusong, China during the Boxer Rebellion (August 1899 - September 1901) as a multinational coalition battled Chinese and Yihetuan anti-imperialist forces - the war becoming a coalition victory. Oregon returned stateside for a much needed overhaul. During March of 1903, the vessel was back in Asian waters and completed a three-year commitment in the region. Following that, the vessel was decommissioned for the first time during April 1906.
During August of 1911, USS Oregon was recommissioned but this service tenure was short-lived. The subsequent years proved rather uneventful and Oregon was set back into reserve status from 1914 onwards. With the outbreak of war in Europe during the summer of 1914 to begin World War 1 (1914-1918), tensions worldwide mounted and the United States ultimately entered the war on the side of the Allies during 1917. This pulled USS Oregon back into active service as she was used to escort vital cargo ships supporting the White Russian forces against the Communist Red Army during the Russian Civil War (1917-1922) - an outgrowth of the global conflict.
With World War 1 having ended with the Armistice of November 1918, USS Oregon was a victim of the military drawdown and the Washington Naval Treaty naval limitations that proceeded the conflict, being decommissioned again on October 4th, 1919. She became a floating museum for the state of Oregon beginning in June of 1925 and remained at this post for decades. She was handed the new designation of IX-22 in February of 1941.
With the arrival of World War 2 (1939-1945), the United States was once-again plunged into a European conflict and all manner of war-making goods were sought. Unfortunately for the Oregon, she was unfit for combat as a warship but her sea-going usefulness was not completely overlooked. She was returned to USN ownership and converted to serve in wartime where she was present at the Battle of Guam (July - August 1944) and aided in the American victory as an ammunition carrier under tow. Oregon managed to survive the war intact and ended her days near Guam after the Japanese surrender of 1945. In November of 1948, Oregon fell victim to a passing typhoon which severed her lines from her berthing place. She drifted out to sea before being located and recovered. Once brought back, it was decided the vessel best be scrapped. She was sold off in March of 1956.
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