Portal:United States/Anniversaries/April/April 7
- 1788 – American Pioneers to the Northwest Territory arrive at the confluence of the Ohio and Muskingum rivers, establishing Marietta, Ohio as the first permanent American settlement of the Northwest Territory.
- 1890 – Marjory Stoneman Douglas, conservationist and writer whose book The Everglades: River of Grass redefined popular perception of the Florida Everglades and was instrumental in ensuring their preservation, was born.
- 1940 – Booker T. Washington becomes the first African American to be depicted on a United States postage stamp (pictured).
- 1954 – President Dwight D. Eisenhower gives his "domino theory" speech during a news conference.
- 2001 – NASA launches the robotic spacecraft Mars Odyssey, an orbiter designed to hunt for evidence of past or present water or volcanic activity on Mars.
On this day for the United States
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Events
- 1798 - The Mississippi Territory is organized from territory ceded by Georgia and South Carolina and is later twice expanded to include disputed territory claimed by both the U.S. and Spain.
- 1805 - Lewis and Clark Expedition: The Corps of Discovery breaks camp among the Mandan tribe and resumes its journey West along the Missouri River.
- 1829 - Joseph Smith, Jr., founder of The Church of Jesus Christ of Latter-day Saints, commences translation of the Book of Mormon, with Oliver Cowdery as his scribe.
- 1862 - American Civil War: Battle of Shiloh ends - Union Army under General Ulysses S. Grant defeat the Confederates near Shiloh, Tennessee.
- 1922 - Teapot Dome scandal: United States Secretary of the Interior leases Teapot Dome petroleum reserves in Wyoming.
- 1927 - First distance public television broadcast (from Washington, DC to New York City, displaying the image of Commerce Secretary Herbert Hoover).
- 1933 - Prohibition was repealed for beer of no more than 3.2% alcohol by weight, eight months before the ratification of XXI amendment.
- 1940 - Booker T. Washington becomes the first African American to be depicted on a United States postage stamp.
- 1954 - U.S. President Dwight D. Eisenhower gives his "domino theory" speech during a news conference.
- 1964 - IBM announces the System/360.
- 1971 - U.S. President Richard Milhous Nixon announces his decision to increase the rate of American troop withdrawals from Vietnam.
- 1978 - Development of the neutron bomb is canceled by U.S. President Jimmy Carter.
- 1983 - During STS-6, astronauts Story Musgrave and Don Peterson perform the first Space Shuttle spacewalk.
- 1990 - Iran–Contra affair: John Poindexter is found guilty of five charges for his part in the scandal (the conviction was reversed on appeal).
- 1999 - The World Trade Organization (WTO) rules in favor of the United States in its long-running trade dispute with the European Union over bananas.
- 2001 - Mars Odyssey is launched.
- 2003 - U.S. troops capture Baghdad; Saddam Hussein's regime falls two days later.