The Fernig Sisters, aides-de-camp to General Dumouriez - by Albert-Ferdinand Le Dru

H. Vernet

 Félicité Fernig (1770–1841) was with her sister Théophile Fernig (1775–1819), known as one of the Sœurs Fernig (Fernig sisters); two sisters who enlisted in the French army dressed as men during the French revolutionary wars, and who were allowed to remain in service after their gender was discovered, becoming celebrities frequently mentioned in the contemporary French press. Thanks to Bob for this. Wiki on the Fernig sisters here

Felicité Fernig 1792 from Napoleon's women camp followers Osprey