What was one effect of the Oklahoma land rush.

The territory once known as "Unassigned Lands" entered to United States as the forty-sixth state of the Union.

Explanation:

In April 1889 the Oklahoma land rush opened nearly 2 million-acre that once was an Indian Territory for settlement of Americans. Most of the men that participated in the land rush were white, some African Americans.

In the beginning of 1900's the territory once known as Unassigned Lands entered to United States becoming the forty-sixth state of the Union, as Oklahoma.