In 1779 he entered the French military service (Royal-Baviere), accompanied General Rochambeau to America as his adjutant, distinguished himself during the war with England, notably at the siege of Yorktown, 1781, and in 1785 was promoted to be colonel proprietaire of the regiment Royal-Suedois.
See Vallet de Viriville, Isabeau de Baviere (1859); Marcel Thibault, Isabeau de Baviere, Reine de France, La Jeunesse,j 1 37 0 - 1405 (1903).
(1893); Vallet de Viriville, "Isabeau de Baviere," Revue frangaise (1858-1859); M.
Thibaut, Isabeau de Baviere (1903).
Et Louis de Baviere" in Abhandl.