 Steaming upriver through steep gorges and swift rapids, the gunboat became the first U.S. warship to reach Chungking, from the sea, on 28 August.Remaining at that port until 23 September, she then joined her sister-ship in protecting American lives and property on the upper reaches of the Yangtze.Except for a brief period from 6 April to 14 August 1917 when she was interned at Shanghai before an international agreement allowed Allied warships to continue patrols, "Palos" spent her entire career as part of the Yangtze Patrol.