Rubuta ci gaba ga wannan sakin layi - an haifi Duncan Mansfield a watan Fabrairun 1778 a Albany, New York. Ya shiga cikin Rundunar Sojan Ruwa ta Amurka a Philadelphia, Pennsylvania a ranar 11 ga Agusta 1798 kuma ya yi aiki har zuwa 1805. Yayin da yake aiki a kan jirgin ruwa a lokacin yakin farko na Barbary
, Sergeant Mansfield ya ba da gudummawa ga aikin da aka yi a karkashin jagorancin Lt. Stephen Decatur, Jr., 16 Fabrairu 1804. Lieutenant Decatur da ma'aikatansa 84-mutum sun yi tafiya ketch, wanda aka ɓoye a matsayin jirgin ruwa na Larabawa, a cikin Tripoli Harbor don halakar da jirgin ruwan Amurka da aka kama kwanan nan kuma ya hana amfani da ita a kan Amurka.