Dee ihe na-aga n'ihu na paragraf a - Na 1789, Lefebvre bụ onye isi ndị agha na Gardes Françaises. Mgbe ọ gbasasịrị, ọ banyere na National Guard, ebe ọ merụrụ ahụ na-echebe Royal Family site na ndị iwe iwe, mgbe nke ahụ gasịrị, ọ sonyeere mgbanwe ahụ. N'ịbụ onye e buliri n'ọkwa brigadier n'afọ 1793, o sonyere n'agha Fleurus (24 June 1794). Mgbe General Louis Lazare Hoche nwụsịrị, o duziri ndị agha nke Sambre-et-Meuse (September 1797). Mgbe ahụ, o nyere ndị agha nke ndị agha nke Danube n'okpuru Jourdan na March 1799, ọ bụ ezie na maka izu mbụ nke mkpọsa ahụ, ọ na-enweghị ike site na ringworm na Dominique Vandamme dochie ya nwa oge. E mechara merụọ ya ahụ́ n'Agha Ostrach.
ebe ndị Advance Guard tara ahụhụ n'agha ndị mbụ. Na November 1799, Lefebvre duziri ndị agha Paris ma kweta ịkwado Napoleon Bonaparte ná "mgbanwe ọchịchị" ya. Na 1800, Bonaparte họpụtara ya ịbụ onye nnọchiteanya nke ndị omeiwu.