Villa - Glass negative photogrpah. Public domain.

Photo shows General Francisco "Pancho" Villa (1877-1923) on horseback, during the Mexican Revolution. Possibly taken at the time of the Battle of Ojinga, Chihuahua, which took place in January 1914. (Source: Flickr Commons project, 2010) Possibly related to the Mutual Film Co., which contracted with Pancho Villa to produce a silent film "The life of General Villa" during the Mexican Revolution in 1914.