WHAT HAPPENED IN 1848.
Look what happened the 1848.

Mexican–American War: Mexico ratifies the Treaty of Guadalupe Hidalgo thus ending the war and ceding California, Nevada, Utah and parts of four other modern-day U.S. states to the United States for US$15 million. (19. May 1848)

Slavery is abolished in Martinique. (22. May 1848)

Wisconsin is admitted as the 30th U.S. state. (29. May 1848)

The Slavic congress in Prague begins. (2. June 1848)

In the Wallachian Revolution, Ion Heliade Rădulescu and Christian Tell issue the Proclamation of Islaz and create a new republican government. (21. June 1848)

Beginning of the June Days Uprising in Paris, France. (23. June 1848)

End of the June Days Uprising in Paris. (26. June 1848)

Slaves are freed in the Danish West Indies (now U.S. Virgin Islands) by Peter von Scholten in the culmination of a year-long plot by enslaved Africans. (3. July 1848)

Waterloo railway station in London opens. (11. July 1848)

Women's rights: a two-day Women's Rights Convention opens in Seneca Falls, New York. (19. July 1848)

Irish Potato Famine: Tipperary Revolt – in Tipperary, Ireland, then in the United Kingdom, an unsuccessful nationalist revolt against British rule is put down by police. (29. July 1848)

Oregon Territory is organized by act of Congress. (14. August 1848)

Camila O'Gorman and Ladislao Gutierrez are executed on the orders of Argentine dictator Juan Manuel de Rosas. (18. August 1848)

California Gold Rush: the New York Herald breaks the news to the East Coast of the United States of the gold rush in California (although the rush started in January). (19. August 1848)

The United States annexes New Mexico. (22. August 1848)

Switzerland becomes a Federal state. (12. September 1848)

Vermont railroad worker Phineas Gage survives a 3-foot (0.91 m)-plus iron rod being driven through his head; the reported effects on his behavior and personality stimulate thinking about the nature of the brain and its functions. (13. September 1848)

The American Association for the Advancement of Science is created. (20. September 1848)

Battle of Pákozd: stalemate between Hungarian and Croatian forces at Pákozd; the first battle of the Hungarian Revolution of 1848. (29. September 1848)

The first railroad in Spain – between Barcelona and Mataró – is opened. (28. October 1848)