Fremont, John Charles was born on April 19, 1849 in San Francisco, California, United States. Son of Major General John Charles (United States of America) and Jessie (Benton) F.
Graduated from the United States Naval Academy, 1872. Adding expert studies in torpedoes, electrical science and ordnance.
Promoted through various grades to rank of captain, October 10, 1906. Commanded United States Ship Pinta, 1875-1877 (suppressed riots Baltimore, 1877). United States Ship Drift, 1883-1885.
Torpedo boat Porter in Spanish-American War. Commandant Cavite Navy Yard, 1899-1901. United States Ship Calgoa, 1902-1903.
Was commanding United States monitor Florida, June 1903. 6 months’ special duty as expert on searchlights on army board for coast fortification, 1902. Naval attache Paris and St. Petersburg, 1906-1907.