WHAT HAPPENED IN 1845.
Look what happened the 1845.

The Cobble Hill Tunnel in Brooklyn, New York, New York is completed. (1. January 1845)

"The Raven" is published in the New York Evening Mirror, the first publication with the name of the author, Edgar Allan Poe (29. January 1845)

President John Tyler signs a bill authorizing the United States to annex the Republic of Texas. (1. March 1845)

Florida is admitted as the 27th U.S. state. (3. March 1845)

The Flagstaff War: Unhappy with translational differences regarding the Treaty of Waitangi, chiefs Hone Heke, Kawiti and Māori tribe members chop down the British flagpole for a fourth time and drive settlers out of Kororareka, New Zealand. (11. March 1845)

Felix Mendelssohn's Violin Concerto receives its première performance in Leipzig with Ferdinand David as soloist. (13. March 1845)

Captain Sir John Franklin and his ill-fated Arctic expedition depart from Greenhithe, England. (19. May 1845)

The Russian Geographical Society is founded in Saint Petersburg, Russia. (6. August 1845)

The first issue of Scientific American magazine is published. (28. August 1845)

The Knickerbockers Baseball Club, the first baseball team to play under the modern rules, is founded in New York. (23. September 1845)

The eminent and controversial Anglican, John Henry Newman, is received into the Roman Catholic Church. (9. October 1845)

In Annapolis, Maryland, the Naval School (later renamed the United States Naval Academy) opens with 50 midshipman students and seven professors. (10. October 1845)

A majority of voters in the Republic of Texas approve a proposed constitution that, if accepted by the U.S. Congress, will make Texas a U.S. state. (13. October 1845)

Anglo-French blockade of the Río de la Plata: Battle of Vuelta de Obligado. (20. November 1845)

Manifest Destiny: In a State of the Union message, U.S. President James K. Polk proposes that the United States should aggressively expand into the West. (2. December 1845)

Ether anesthetic is used for childbirth for the first time by Dr. Crawford Long in Jefferson, Georgia. (27. December 1845)

Journalist John L. O'Sullivan, writing in his newspaper the New York Morning News, argues that the United States had the right to claim the entire Oregon Country "by the right of our manifest destiny". (27. December 1845)

In accordance with International Boundary delimitation, United States annexes the Republic of Texas, following the manifest destiny doctrine. The Republic of Texas, which had been independent since the Texas Revolution of 1836, is thereupon admitted as the 28th U.S. state. (29. December 1845)