Mezue ahịrịokwu na-esonụ: Mgbe Brunet nwetasịrị ntaramahụhụ dị mfe ná mba ya nke ịbụ onye a chụpụrụ n'ọrụ ruo ọnwa isii, ọ laghachiri n'usuu ndị agha France na February 1870, na-enwe nanị ntakịrị ihe ọ na-efunahụ n'ọkwá ya. N'oge agha Franco-Prussian nke 1870<unk>1871 o gosipụtara onwe ya na agha nke
Spicheren, Mars-la-Tour na Gravelotte E jidere ya mgbe a nọchibidoro Metz. Mgbe agha ahụ gasịrị, Brunet rụrụ ọrụ dị mkpa dị ka onye otu ndị agha Versailles na mkpochapụ nke Paris Commune. Ọ gara Royal School of Military Engineering na United Kingdom n'August 1871, na mgbe e mesịrị n'afọ ahụ, e mere ya onye ọrụ nke Légion d'honneur ma nye ya ọrụ dị ka onye enyemaka nke ndị agha, Ernest Courtot de Cissey.