Kansas passes first U.S. antitrust law.
Hull House opens in Chicago.
Washington, Montana, North Dakota, and South Dakota join the Union.Chae Chan Ping v. U.S.
; Chinese exclusion laws are constitutional.
First Japanese Nishi Hongwanji priest arrives in Hawaii.
National Farmers’ Alliance formed.
U.S., Great Britain, and Germany establish protectorate over Samoan Islands.First Oklahoma Land Rush (April 22).