Nyora kupfuurira kweiyi ndima - Musi wa 1 Kurume 1806, Deroy akagamuchira Grand Cross yeMasoja Order yaMax Joseph. Muhondo yeMubatanidzwa Wechina
, Deroy akaiswa pasi pokutonga kwaMuchinda Jerome Bonaparte. Akaita kukomba kwakawanda kwenhare dzePrussian muSilesia muna 1806 na 1807. Muna November 1806, 1st Bavarian Division yaDeroy yakakomberedza nhare yeGłowgów (Glogau). Pashure pokunge vaBavarian vakatsiviwa neboka reWürttemberg, nzvimbo yacho yakapa musi wa 2 December. Akafamba kuenda kuWrocław (Breslau) uko divi rake rakasvika musi wa18 Zvita. Mauto aMuchinda Jerome ane vanhu 22 000 akachengetedza nhare yacho kusvika musi wa6 Ndira 1807 apo nhare yacho yakazvipira nevasungwa 5 300 uye zvombo 268. Kurasikirwa kwevaBavarian kwakasvika 259 mukuvhiya. Deroy akabva afambira mberi nemauto 13 000 kuti akombe Brzeg (Brieg). Pana 17 January Brzeg yakapa nevasungwa 1,450.