Kammala jumla mai zuwa: Ayyukan Washington daga ƙarshen 1778 zuwa 1780 sun fi diplomasiyya da ƙungiya, yayin da sojojinsa suka kasance a waje da New York, suna kallon sojojin Sir Henry Clinton da suka mamaye birnin. Washington ta tsara dabarun tare da Faransanci game da yadda za a yi aiki tare a cikin ayyukan da Birtaniya ke yi, wanda ya haifar da yunkurin da ba a yi nasara ba don kawar da Birtaniya daga Newport, Rhode Island da
Savannah, Georgia. Wannan shi ne abin da ya faru. Har ila yau, an jawo hankalinsa ga yakin basasa, wanda ya sa John Sullivan ya jagoranci rundunar sojojin Amurka a 1779 zuwa arewacin New York. Lokacin da Janar Clinton ya aika da Janar Benedict Arnold don ya kai hari a Virginia, Washington ya fara cire wasu daga cikin sojojinsa don fuskantar barazanar da ke girma a can. Zuwan Ubangiji Cornwallis a Virginia bayan yakin neman zabe a kudanci ya gabatar da Washington tare da damar da za ta yi nasara. Sojojin Washington da sojojin Faransa sun koma kudu don fuskantar Cornwallis, kuma sojojin ruwan Faransa da ke karkashin Admiral de Grasse sun yi nasarar katse yunkurin Birtaniya na sarrafa Chesapeake Bay, suna kammala kama Cornwallis, wanda ya mika wuya bayan Siege na Yorktown a watan Oktoba 1781. Ko da yake Yorktown ya nuna ƙarshen tashin hankali a Arewacin Amirka, Birtaniya har yanzu sun mallaki New York da sauran biranen, don haka Washington ya ci gaba da sojojin a fuskar wani majalisa da ya rushe da kuma dakarun da suka kasance a wasu lokuta masu tayar da hankali game da yanayi da biya. An rushe rundunar a hukumance bayan zaman lafiya a 1783, kuma Washington ya yi murabus daga mukaminsa a matsayin babban kwamandan a ranar 23 ga Disamba, 1783.