Editing Chester W. Nimitz (section)

===World War I===
In the summer of 1913, Nimitz (who spoke fluent German) studied engines at the [[MAN Energy Solutions|Maschinenfabrik-Augsburg-Nürnberg]] (M.A.N.)  diesel engine plants in [[Nuremberg]], Germany, and [[Ghent]], Belgium. Returning to the [[New York Navy Yard]], he became [[Executive officer|executive]] and engineer officer of ''Maumee'' at her [[ship commissioning|commissioning]] on 23 October 1916.

After the United States declared war on Germany in April 1917, Nimitz was chief engineer of ''Maumee'' while the vessel served as a refueling ship for the first squadron of US Navy destroyers to cross the Atlantic, to take part in the war. Under his supervision, ''Maumee'' conducted the first-ever [[underway replenishment|underway refuelings]]. On 10 August 1917, Nimitz became aide to Rear Admiral [[Samuel S. Robison]], Commander, Submarine Force, US Atlantic Fleet (<small>[[ComSubLant]]</small>).

On 6 February 1918, Nimitz was appointed chief of staff and was awarded a [[Navy Commendation Medal|Letter of Commendation]] for meritorious service as <small>COMSUBLANT</small>'s chief of staff. On 16 September, he reported to the office of the Chief of Naval Operations, and on October 25 was given additional duty as senior member, Board of Submarine Design.