Patricia was the last to be built of HAPAG's four P-class ocean liners, all of which were completed in the second half of the 1890s. Harland and Wolff launched the first of them, Pennsylvania, in 1896. Blohm & Voss launched Pretoria in 1897 and Graf Waldersee in 1898.

AG Vulcan Stettin launched Patricia on 20 February 1899 and completed her that May.^[1] Her registered length was 560.3 ft (170.8 m), her beam was 62.3 ft (19.0 m) and her depth was 37.1 ft (11.3 m).^[2] As built, she was assessed as 13,023 GRT. She had berths for 162 passengers in first class, 184 in second class and 2,143 in third class.^[3]

Patricia had twin propellers, each driven by a four-cylinder quadruple-expansion steam engine. Between them her twin engines were rated at 719 NHP^[2] and gave her a speed of about 14 knots (26 km/h).^[1]

HAPAG registered Patricia in Hamburg. Her code letters were RLGQ.^[2]

In March 1899 HAPAG announced that the regular route for Patricia and her three sisters would be Hamburg – Cherbourg – Plymouth – New York.^[4] HAPAG also announced a reduction in its transatlantic fares. On Patricia and her sisters the rate for a first class cabin was reduced from $65 to $50, and that for a second class cabin was reduced from $47.50 to $38.^[5]

On 7 May 1899 Patricia began her maiden voyage from Hamburg via Boulogne to New York.^[1] She reached New York on 19 May, and was opened for public inspection at Hoboken Terminal, New Jersey on 25 May.^[6]

In the Elbe on 2 January 1910 Patricia rammed the lightvessel Elbe V, sinking her. Afterwards Patricia was refitted as a two-class ship. First class was abolished, and second class berths were increased to 408.^[3] The refit increased her tonnages to 14,466 GRT and 9,073 NRT.^[1]

By 1913 Patricia was equipped for wireless telegraphy. Her call sign was DDP.^[7]

On 27 November 1913 Patricia began what became her last voyage from Hamburg to New York. On 12 January 1914 the German government requisitioned her as a troop ship to the Jiaozhou Bay Leased Territory on the coast of China.^[1]

On 26 March 1919, HAPAG surrendered Patricia to the United States Government. On 28 March at Cowes, Isle of Wight she was commissioned into the United States Navy, but she was not given a pennant number. Lt Cdr CC Windsor, United StatesNRF, was appointed to command her.

On 30 March 1919 Patricia left Brest, France carrying members of the American Expeditionary Forces home to New York. This was the first of four voyages that Patricia made from France to the USA, in which she repatriated a total of 8,865 servicemen.

In one voyage in April 1919 Patricia brought home from Brest to Boston almost 3,000 troops of the 26th Division, including the 102nd and 103rd machine gun battalions. On 15 April 1919, while Patricia was in mid-Atlantic, Julius Fischer, a HAPAG agent, locked himself in one of her state rooms and set fire to it by causing an electrical short-circuit. Members of her crew broke down the door, put out the fire and arrested Fischer. Other HAPAG agents said that Fischer was mentally unwell at the time. Patricia reached Boston on 17 April.^[8]

On 4 June 1919 Patricia reached Hoboken carrying 2,847 members of the 36th Infantry Division. They included 150 Native American scouts.^[9]

On the night of 11–12 June 1919, as Patricia was leaving New York for France, the cargo ship Redondo accidentally rammed Patricia's sister ship Graf Waldersee in fog about 86 nautical miles (160 km) off Sandy Hook, New Jersey. Graf Waldersee reported 6 feet (2 m) of water in her engine room,^[10] and Redondo shipped water in her forward hold. Patricia received Graf Waldersee's wireless distress signal and came to assist.^[11]

Patricia took off Graf Waldersee's passengers and half of her crew and then took the damaged liner in tow. Late on the morning of 12 June Graf Waldersee's crew beached her on a sandbar on Long Island. Graf Waldersee was refloated on the afternoon of 14 June and four tugs towed her to Brooklyn Navy Yard.^[11]

On 6 September 1919 it was announced that as soon as the United States Department of War had no further use for ships seized from German ports under the Treaty of Versailles, they would be returned to the Inter-Allied Council. The council would decide whether to return the ships to their German owners or redistribute them among the Allies. Patricia was among the ships affected, along with Cap Finisterre, Imperator, Kaiserin Auguste Victoria, Mobile, Pretoria, Prinz Friedrich Wilhelm, Santa Elena and Zeppelin.^[12]

On 18 September 1919 Patricia was decommissioned from the US Navy and transferred to the UK Shipping Controller, which appointed Ellerman's Wilson Line to manage her. In November 1921 she arrived at Blyth, Northumberland to be scrapped.^[13]

• "NH 105010 USS Patricia". Naval History and Heritage Command. – photograph of Julius Fischer under arrest in April 1919
• This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.^{[dead link]}
• Photo gallery of United States Patricia at NavSource Naval History no nationality or prefix;