Dee ihe na-esote paragraf a - Na 1 Machị 1806, Deroy natara Grand Cross nke Military Order nke Max Joseph. N'Agha nke Mgbakọta nke Anọ
, e debere Deroy n'okpuru iwu nke Prince Jerome Bonaparte. O mere ọtụtụ nnọchibido nke ebe e wusiri ike nke Prussia na Silesia n'oge 1806 na 1807. Na Nọvemba 1806, Deroy's 1st Bavarian Division nọchibidoro ebe e wusiri ike nke Głowgów (Glogau). Mgbe ndị Bavaria dochiri ndị Württemberg, ebe ahụ nyefere onwe ya na 2 Disemba. Ọ gara Wrocław (Breslau) ebe nkewa ya rutere na 18 Disemba. Ndi agha nke iri abuo na abuo nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi nke ndi isi. Ndị Bavarian nwụrụ n'agha ahụ dị narị abụọ na iri ise na itoolu. Mgbe ahụ, Deroy kpọọrọ ndị agha 13,000 gaa nọchibido Brzeg (Brieg). Na Jenụwarị 17 Brzeg nyefere onwe ya na ndị mkpọrọ 1,450.