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...s a 19th-century American scientist who helped build the framework of U.S. naval gunnery education. He wrote ''Marshall's Practical Marine Gunnery'' in 1821 ...first= John |author-link= |date= 2021 |title= Muster Roll of the Ordinary, Officers, Seamen, Servants, & Boys Washington Navy Yard |url= http://www.genealogytr ...

{{Use American English|date=June 2018}} The Army led the United States into space, launching the first American spacecraft, [[Explorer 1]], on 31 January 1958.<ref name="spaceforce.mil"/> ...

==Recorded history before 12th century== ...Oxford|access-date=14 October 2014|url=http://www.visitoruk.com/Oxford/8th-century-T4311.html}}</ref> ...