Mezue ahịrịokwu na-esonụ: Boniface de Castellane banyere n'usuu ndị agha France n'ụbọchị e chiri Napoléon nke Mbụ nke France eze (December 2, 1804) dị ka onye agha a họpụtara ahọpụta na 5th Light Infantry Regiment. N'ọnwa Febụwarị nke afọ 1806, e buliri ya n'ọkwa lieutenant nke abụọ na ndị 7th Dragoons. N'otu ọnwa ahụ, a kpọfere ya na 24th Dragoons onye ya na ya jere ozi na Alaeze Naples. N'afọ 1808, de Castellane sooro ọchịagha Georges Mouton banye Spain dị ka "onye enyemaka-nke-ogige". Mgbe Napoléon laghachiri Germany n'afọ 1809, de Castellane sochiri ya ma lụọ agha ahụ na
Abensberg, Eckmühl, Ratisbon, Aspern-Essling na Wagram.