Being on general Rochambeau's staff for the duration of the war, Chastellux acted as the principal liaison officer between the French commander in chief and George Washington.
The Chevalier de Chastellux was also widely recognized, at the time of his campaigns in America, as a highly talented man of letters and a member of the Académie Française.
Major General de Chastellux was fluent in English and with his strong ideological support of the American cause, he served the alliance well.
After his return to France, Chastellux also remained in contact with Thomas Jefferson, now the American representative in Paris, whom he had previously visited on his Virginia estate at Monticello.
[3] Major General de Chastellux placed on record and published in 1786 his complete recollections of the American War of Independence.