1st » The few remaining Mormons left in Nauvoo, Illinois, formally dedicate the Nauvoo Temple (Latter Day Saints) called Temple.
8th » Mexican–American War: The Battle of Palo Alto Zachary Taylor defeats a Mexican force north of the Rio Grande in the first major battle of the war.
11th » President James K. Polk asked for and received a Declaration of War against Mexico, starting the Mexican–American War
13th » Mexican–American War: The United States declares war on Mexico.
23rd » Mexican–American War: President Mariano Paredes of Mexico unofficially declares war on the United States.
Famous Birthdays on May in 1846
5th » Henryk Sienkiewicz, Polish author, Nobel Prize in Literature known as Nobel Prize laureate (d. 1916)