1845 in the United States
Events from the year 1845 in the United States.
March 4: James K. Polk becomes the 11th U.S. president
George M. Dallas becomes the 11th U.S. vice president
December 27: The term "Manifest Destiny" is influentially used by John L. O'Sullivan (the concept is depicted in this 1872 painting by John Gast)
Andrew Jackson
1844 in the United States
Events from the year 1844 in the United States.
February 28: USS Princeton disaster