Deaths on March 4

Carsten Hauch, Danish poet and playwright (b. 1790)

Johannes Carsten Hauch (12 May 1790 – 4 March 1872) was a Danish poet.

5 Mar

Railway air brake
George Westinghouse patents the air brake.
22 May

Amnesty Act
Reconstruction Era: President Ulysses S. Grant signs the Amnesty Act into law, restoring full civil and political rights to all but about 500 Confederate sympathizers.
18 Nov

United States presidential election, 1872
Susan B. Anthony and 14 other women are arrested for illegal voting in the United States presidential election of 1872.
29 Nov

Battle of Lost River
American Indian Wars: The Modoc War begins with the Battle of Lost River.
9 Dec

P. B. S. Pinchback
In Louisiana, P. B. S. Pinchback becomes the first African-American governor of a U.S. state.