WHAT HAPPENED IN 1847.
Look what happened the 1847.

The world's first "Mercy" Hospital is founded in Pittsburgh, Pennsylvania by the Sisters of Mercy, the name will go on to grace over 30 major hospitals throughout the world. (1. January 1847)

Samuel Colt sells his first revolver pistol to the United States government. (4. January 1847)

The Treaty of Cahuenga ends the Mexican–American War in California. (13. January 1847)

John C. Frémont is appointed Governor of the new California Territory. (16. January 1847)

Yerba Buena, California is renamed San Francisco. (30. January 1847)

The first group of rescuers reaches the Donner Party. (19. February 1847)

Mexican–American War: The Battle of Buena Vista – 5,000 American troops defeat 15,000 Mexicans. (22. February 1847)

Mexican–American War: Battle of Buena Vista – In Mexico, American troops under future president General Zachary Taylor defeat Mexican General Antonio López de Santa Anna. (23. February 1847)

The state of Michigan formally abolishes capital punishment. (1. March 1847)

Mexican–American War: The first large-scale amphibious assault in U.S. history is launched in the Siege of Veracruz. (9. March 1847)

Mexican–American War: United States forces led by General Winfield Scott take Veracruz after a siege. (29. March 1847)

Birkenhead Park, the first civic public park, is opened in Birkenhead. (5. April 1847)

The accidental shooting of a Māori by an English sailor results in the opening of the Wanganui Campaign of the New Zealand land wars. (16. April 1847)

The last survivors of the Donner Party are out of the wilderness. (25. April 1847)

The American Medical Association is founded in Philadelphia, Pennsylvania. (7. May 1847)

After 17 months of travel, Brigham Young leads 148 Mormon pioneers into Salt Lake Valley, resulting in the establishment of Salt Lake City. Celebrations of this event include the Pioneer Day Utah state holiday and the Days of '47 Parade. (24. July 1847)

Liberia declares its independence. (26. July 1847)

Henry David Thoreau leaves Walden Pond and moves in with Ralph Waldo Emerson and his family in Concord, Massachusetts. (6. September 1847)

Stephen Foster's song "Oh! Susanna" is first performed at a saloon in Pittsburgh. (11. September 1847)

Mexican–American War: the Battle of Chapultepec begins. (12. September 1847)