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The Unassigned Lands Run was on 22 April 1889.
The Land Run was held in 1889.
The first civilized tribe to offer to sell unoccupied lands was the Cherokees. According to the History of Oklahoma, President Cleveland signed the bill approving the opening of Unassigned Lands to the public and "The Cherokee Strip Livestock Association" was offering $3 ore acre.
OklahomaOn 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
(UNASSIGNED) used as an adjective is very rare.Well the word (unassigned) means not assigned.
The indian removal act
Oklahoma State had the most indian-held lands in 1894.
The land rush started on April 22, 1889 at high noon. By the end of the day, both the cities of Oklahoma City and Guthrie were founded and had 50,000 citizens each. The movement for settling Oklahoma and the Land Rush led to the terms booner and sooner which were then used for the University of Oklahomaâ??s fight song.
The land given to the United States by the Seminole Indians was known as the Unassigned land which became the Oklahoma Territory.
Sooners was the name giver to settlers who entered unassigned lands before the territory was opened to settler claims, April 1899
The only modern state that is made up of lands from the Indian Territory is Oklahoma.
At precisely high noon, thousands of would-be settlers make a mad dash into the newly opened Oklahoma Territory to claim cheap land.