Rubuta ci gaba ga wannan sakin layi - L'Enfant ya ji rauni a Siege na Savannah
a ranar 9 ga Oktoba, 1779. Ya warke kuma ya zama fursuna na yaki a lokacin da aka mika wuya na Charleston, South Carolina a ranar 12 ga Mayu, 1780. An musayar shi a watan Nuwambar 1780 kuma ya yi aiki a kan ma'aikatan Janar Washington don sauran juyin juya halin Amurka. L'Enfant ya inganta ta hanyar takardar shaidar zuwa Major a cikin Corps of Engineers a ranar 2 ga Mayu, 1783, a matsayin godiya ga hidimarsa ga dalilin 'yancin Amurka. An sallame shi lokacin da aka rushe rundunar sojojin Amurka a watan Disamba na 1783.