Conquest of Algeria Crimean War Viscount Armand-Octave-Marie d'Allonville (21 January 1809 – 19 October 1867) was a French general of division which distinguished himself during the French conquest of Algeria and the Crimean War.

After his graduation from the École d'application du Corps royal d'état-major, he entered the cavalry.

Colonel of the 5th Hussar Regiment in 1845, he was promoted general of brigade in 1851 and participated to Napoléon III's coup d'état, 2 December 1851.

Under his command, the Chasseurs d'Afrique cleared the two half batteries of guns, two infantry battalions and Cossacks on the Fedyukhin Heights to ensure the British Light Brigade would not be hit by fire from that flank and later provided cover for the remaining elements of the Light Brigade as they withdrew.

[1] D'Allonville's declining health led him to leave active service in the French army and he became conseiller-général of Ille-et-Vilaine.