in 1919 On 6 April 1917
the US declared war against the Central Powers.
The Netherlands were neutral in the First World War, but on 20 June 1917 the US detained
Rijndam. She became one of 89 Dutch ships that the
United States Customs Service seized under
angary in March 1918. 31 of these were commissioned into the US Navy.
Rijndam was converted into a troopship, with capacity for up to 3,000 troops. Together the two contingents formed the 35th US convoy of the war. It was escorted by the
cruiser USS Frederick. On 21 May, 11
destroyers relieved
Frederick as escorts. On 24 May the convoy reached
Brest. to
Newport News in March 1919 On 29 May
Rijndam left Brest on her return voyage, in convoy with
Antigone,
President Lincoln,
Susquehanna, and an escort of destroyers. At sunset the next day the destroyers detached, and the troopships continued unescorted. On the morning of 31 May, attacked the convoy. Three torpedoes sank
President Lincoln.
U-90 fired torpedoes at
Rijndam, but the troopship took successful evasive action, and shortly afterward, nearly rammed a submarine cruising at periscope depth. The cruisers
Frederick and and destroyers and escorted them. The battleship
Texas and several other destroyers joined the escort for a time.
Rijndam landed troops and supplies at Brest on three more occasions until November 1918, and once at
Quiberon in July. After the Armistice she repatriated US troops from Quiberon, Brest and
Saint-Nazaire to Newport News,
Norfolk, Virginia,
Hoboken and New York.
Princess Matoika was the swifter ship, but
Rijndam recruited volunteers from the
133rd Field Artillery Regiment aboard as extra
stokers for her furnaces, and with their help she narrowly won the race.
Rijndams final troop repatriation voyage was from Brest, and reached New York on 4 August 1919. On 11 August 1919
Rijndam was transferred from the
Cruiser and Transport Force to the
3rd Naval District in
New York. She was decommissioned, and on 22 October 1919 she was returned to her owners. ==Later career==