The USS St. Louis (C-20/CA-18), was the lead ship of her class of protected cruisers in the United States Navy. St. Louis was launched on 6 May 1905 by the Neafie & Levy Company, of Philadelphia, Pennsylvania. She was sponsored by Miss Gladys Bryant Smith and commissioned on 18 August 1906 with Captain Nathaniel R. Usher in command. Service history Pre-war Assigned to the Pacific Fleet, St. Louis departed Tompkinsville, New York, on 15 May 1907 following completion of her trials along the Virginia coast. St. Louis called at Port Castries, Bahia, Rio de Janeiro, Montevideo, Punta Arenas, Valparaíso, Callao, and Acapulco before arriving at San Diego on 31 August 1907. Operating off the west coast into the spring of 1908, she steamed from Puget Sound to Honolulu in June, then cruised in Central American waters from July to October. On 5 November 1909, St. Louis returned to Puget Sound and was placed in reserve on 14 November. Decommissioned on 3 May 1910, St. Louis was recommissioned, in reserve, on 7 October 1911 at the Puget Sound Navy Yard. She departed Puget Sound on 13 July 1911 for San Francisco and brief service as receiving ship there. After undergoing repairs, 22 July 1911 to 28 February 1912, she joined the Pacific Reserve Fleet again on 12 March. From 14 July 1912 until 26 April 1913, she operated in support of the Oregon Naval Militia, then returned to the Puget Sound Navy Yard to be placed in the Pacific Reserve Fleet for a year. She departed Puget Sound on 24 April 1914 and commenced her next assignment as receiving ship at San Francisco on the 27th. Returning north to Bremerton, St. Louis was again placed in the Pacific Reserve Fleet on 17 February 1916. Detached from the Reserve Fleet on 10 July 1916, St. Louis departed Puget Sound on 21 July for Honolulu. Arriving at Pearl Harbor on 29 July, she commenced her next duty assignment as tender, Submarine Division Three, Pacific Fleet, with additional duty as station ship, Pearl Harbor. When it became evident that the crew of the interned German sloop intended to scuttle their ship, an armed party from St. Louis boarded the ship on 4 February 1917 and seized her. Geier subsequently served the United States as . World War I Placed in reduced commission on 6 April 1917, as the United States entered World War I,