1820 – Born on May 15th in Brown County, Ohio. American naval officer and author.
1834 – He was appointed midshipman on July 7th, and ordered to West Point, where he studied for three months, under his brother Jacob Ammen, later a brigadier general in the United States Army.
1849 – He was appointed lieutenant on November 4th.
1869 – He was chief of the Bureau of Yards and Docks.
1871 – He was chief of the Bureau of Navigation until his retirement.
1872 – He was appointed member of a commission to examine and report on the feasibility of constructing a canal through Nicaragua.
1877 – He became rear admiral on December 11th.
1879 – He was sent as a delegate to a congress in Paris to discuss Isthmian canal questions.
1883-1891 – Among his works are "The Atlantic Coast" (New York); "Recollections of Grant"; "The Old Navy and the New" (autobiographical); "Country Homes and Their Improvements"; "Fallacies of the Interoceanic Transit Questions," and various contributions to current literature.
1898 – Died on July 11th in Washington, D.C.