USS Platte (AO-24) was a Cimarron-class oiler serving with the United States Navy, named for the 1836 Platte Purchase that included the Platte Rivers in Iowa, Missouri and Nebraska.
Her memorial in Platte County, Missouri honors all four rivers that share the name recorded by Lewis and Clark in 1803. https://en.wikipedia.org/wiki/USS_Platte_(AO-24)