On November 22, 1862 he was promoted to ensign and assigned to the sidewheel steamerMississippi and continued to serve on the blockading squadron until 1863. He served on the ironcladgunboatEssex and was on board this ship during the siege of Port Hudson.[1] Shepard received a letter of commendation from General Richard Arnold, who was General Nathaniel P. Banks' Chief of Artillery, after he had served on shore with a naval battery for several weeks.
Shepard served on the monitorMahopac during the siege of Charleston, South Carolina, then on the steam sloop Wachusett during the capture of the Confederate privateer Florida on October 7, 1864. He was commissioned as a lieutenant on February 22, 1864.[1]
Shepard served on several other ships before being promoted to commander on 9 May 1878. From 1878 to 1881 he was at the Naval Academy, and immediately after from 1879 to 1881 commanded the Constitution, and then in 1882 Enterprise.[1]
From 1882–1886 Shepard was the Superintendent of the New York Nautical School on board the sloop-of-war St. Mary's. He was then assigned to the Philadelphia Naval Asylum. In May 1889, he was given the command of the Kearsarge. From the Kearsarge he went to the Mohican, which was with the Pacific Squadron, remaining there from February 1890 to August 1891. After that service he was made Lighthouse Inspector until his promotion to Captain in May 1893, when he was detailed as equipment officer of the New York Navy Yard for four months. He then commanded Minnesota from August 1893 to November 1894, then San Francisco until July 1897, and finally the receiving shipRichmond through April 1898. Afterwards, he again served as a lighthouse inspector until 1901.[2][1]
Shepard was promoted to captain on May 15, 1893, and to rear admiral on March 3, 1901.[1][3] In 1901, Shepard became the first flag officer to become a student at the Naval War College.[4]
Shepard retired on June 13, 1902[2] on his own request. He died on August 17, 1904, of heart disease,[5] and was buried at Arlington National Cemetery.[6] He was married to Alice Stevens Shepard, who died in 1915 and was buried next to her husband.
^Hattendorf, Simpson, and Wadleigh, Sailors and Scholars: the Centennial History of the Naval War College (Newport: Naval War College, 1984), pp. 55, 325.
^"Personal". The National Tribune. Washington, D.C. September 4, 1904. p. 4. Retrieved 6 September 2016.