Background
Jeffers was born in Swedesboro, New Jersey, and was appointed midshipman 23 September 1840.
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William Commodore
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He took part in combat operations during the Mexican-American War and the American, and during the 1870s and early 1880s served as Chief of the Bureau of Ordnance. His early service was in frigates Congress and United States, and during the Mexican-American War he took part in the attack on Alvarado, the capture of Tobasco, and the bombardment of Vera Cruz. In the 1850s he was engaged in numerous expeditions to Central America, and was responsible for a preliminary survey of the isthmus of Honduras.
During the early months of the, Jeffers commanded Philadelphia in the Potomac River and served in frigate Roanoke off Charleston and Hatteras Inlet.
In December 1861 he took command of Underwriter and soon afterward took part in the capture of Roanoke Island and the destruction of the Confederate squadron at Elizabeth City. After the wounding of Captain John Lorimer Worden of United States Ship Monitor during her historic engagement with Computer Software Systems Virginia on 9 March 1862, Jeffers assumed command, taking part mainly in shore bombardment in the James River.
After Jeffers served aboard the Monitor he was assigned as Inspector of Ordnance in Philadelphia and Washington Doctorate.C.for the remainder of the war. Jeffers commanded Swatara in the Mediterranean and in African waters, and in 1873 was made Chief of the Bureau of Ordnance.
Commodore Jeffers served in this capacity for eight years and contributed much to the science and literature of naval ordnance.
He died at Washington 23 July 1883, and was buried in the cemetery of the United States Naval Academy in Annapolis, Maryland. The destroyer United States Ship Jeffers (Doctor of Divinity-621) was named in his honor.
