1845 events in history

Jan 1 The Cobble Hill Tunnel in Brooklyn, New York, New York is completed
Jan 29 "The Raven" is published in the New York Evening Mirror, the first publication with the name of the author, Edgar Allan Poe
Mar 1 President John Tyler signs a bill authorizing the United States to annex the Republic of Texas
Mar 3 Florida is admitted as the 27th U.S. state
Mar 11 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
Mar 13 Felix Mendelssohn's Violin Concerto receives its première performance in Leipzig with Ferdinand David as soloist
May 19 Captain Sir John Franklin and his ill-fated Arctic expedition depart from Greenhithe, England
Aug 6 The Russian Geographical Society is founded in Saint Petersburg, Russia
Aug 28 The first issue of Scientific American magazine is published
Sep 23 The Knickerbockers Baseball Club, the first baseball team to play under the modern rules, is founded in New York
Oct 9 The eminent and controversial Anglican, John Henry Newman, is received into the Roman Catholic Church
Oct 10 In Annapolis, Maryland, the Naval School (later renamed the United States Naval Academy) opens with 50 midshipman students and seven professors
Oct 13 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
Nov 20 Anglo-French blockade of the Río de la Plata: Battle of Vuelta de Obligado
Dec 2 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
Dec 27 Ether anesthetic is used for childbirth for the first time by Dr. Crawford Long in Jefferson, Georgia
Dec 27 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"
Dec 29 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