Things that happened on the 13th July...

Alicia Garza posts a message on Facebook on July 13, 2013. Her post contains the phrase "Black lives matter,"

in 1793, Jean-Paul Marat, a leader of the radical Montagnard faction during the French Revolution, was stabbed to death in his bath by Charlotte Corday,

The U.S. Congress passed the Northwest Ordinance of 1787, which laid the basis for the government of the Northwest Territory and for the admission of its constituent parts as states of the union.

in 1832 Henry Rowe Schoolcraft identified the source of the Mississippi River as Lake Itasca in Minnesota.