Births on March 31

Hermann de Pourtalès, Swiss sailor (d. 1904)

Count Hermann Alexander de Pourtalès (31 March 1847 – 28 November 1904) was a Swiss sailor who competed in the 1900 Summer Olympics.

22 Feb

Battle of Buena Vista
Mexican-American War: The Battle of Buena Vista: Five thousand American troops defeat 15,000 Mexicans troops.
23 Feb

Battle of Buena Vista
Mexican-American War: Battle of Buena Vista: In Mexico, American troops under future president General Zachary Taylor defeat Mexican General Antonio López de Santa Anna.
9 Mar

Siege of Veracruz
Mexican-American War: The first large-scale amphibious assault in U.S. history is launched in the Siege of Veracruz.
12 Sep

Battle of Chapultepec
Mexican-American War: the Battle of Chapultepec begins.
13 Sep

Battle of Chapultepec
Mexican-American War: Six teenage military cadets known as Niños Héroes die defending Chapultepec Castle in the Battle of Chapultepec. American troops under General Winfield Scott capture Mexico City in the Mexican-American War.