[1] His father was Charles-François Delacroix (or Lacroix), minister of Foreign Affairs under the Directory.

His youngest brother was the future painter Eugène Delacroix (1798–1863), born twenty years after him.

General Joubert promoted him to Lieutenant on 13 August 1799 in recognition of his gallantry.

On 3 January 1800 he was accepted as Lieutenant in the Chasseurs-a-Cheval Regiment of the Consular Guard.

[7] On 6 June 1805 he was promoted to Major, and became an aide to Prince Eugène de Beauharnais.

[7] Delacroix returned to France after Napoleon abdicated in 1814 and was placed on the non-active list.