Oklahoma
On April 22, 1889 the unassigned lands of the Indian Territory (later called Oklahoma Territory) were opened to settlers. Thousands of people lined up on the border and, when the signal was given, they raced into the territory to claim their land. Some people went in early to stake claims. They became known as Sooners.
Hence, Oklahoma's nickname today is "The Sooner State".
source: http://www.salinaok.com/oklahoma.html
it is also called the sooner state.
Oklahoma university is called the sooners, and Oklahoma STATE is called the cowboys
The Sooner State
sooner state
Native America or Land of the Red Man or the Sooner State
Oklahoma.
Oklahoma
The Sooner state
Oklahoma, the sooner state, has the postal abbreviation of OK.
Oklahoma.
Oklahoma is "the Sooner State" and Missouri is the "Show Me State."
The US state of Oklahoma is unofficially known as the Sooner State. Areas of land were to be opened for settlers to lay claim to, however it was illegal for any potential settler to enter the area before it was open. Those who entered the area early were called "Sooners".