On this day for the United States
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Events
- 1836 - Texas Revolution: A day after the Battle of San Jacinto forces under Texas General Sam Houston capture Mexican General]Antonio López de Santa Anna.
- 1863 - American Civil War: Grierson's Raid begins – troops under Union Colonel Benjamin Grierson attack central Mississippi.
- 1864 - The U.S. Congress passes the Coinage Act which mandates that the inscription "In God We Trust" be placed on all coins minted as United States currency.
- 1876 - The Boston Red Stockings defeat the Philadelphia Athletics 6-5 in the first National League Baseball game.
- 1889 - At high noon, thousands rush to claim land in the Land Rush of 1889. Within hours the cities of Oklahoma City and Guthrie are formed with populations of at least 10,000.
- 1898 - Spanish–American War: The United States Navy begins a blockade of Cuban ports and the USS Nashville captures a Spanish merchant ship.
- 1930 - The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding.
- 1954 - Red Scare: Army–McCarthy hearings begin.
- 1964 - The 1964-1965 New York World's Fair opens for its first season.
- 1970 - First Earth Day celebrated.
- 1972 - Vietnam War: Increased American bombing in Vietnam prompts antiwar protests in New York City, San Francisco, and Los Angeles.
- 1993 - The Holocaust Memorial Museum in Washington, D.C. is dedicated.
- 1993 - The web browser Mosaic version 1.0 is released.
- 1998 - Disney's Animal Kingdom opens at Walt Disney World near Orlando, Florida, United States.
- 2000 - In a predawn raid, federal agents seize six-year-old Elián González from his relatives' home in Miami.