 DATE: At least twice in the movie, characters refer to General  Huerta as the president of Mexico. This would place the time period  between early Spring of 1913 and the summer of 1914. However, when  Sikes is telling the bunch about a flying machine, Pike informs them  that he heard the machines would be used in "the war" which would  place the time period late 1914 after Huerta had been overthrown.  During the revolt against Huerta, General Carranza was the leading  rebel; Pancho Villa was a minor figure (Villa came to prominence  after Carranza overthrew Huerta, and Villa led a revolt against  Carranzas government). At least twice, someone in the movie refers  to Pancho Villa. This may have been an attempt to place a well known  name before the movie going public.