Kammala wannan jumlar: A lokaci guda, ƙin yarda da Portugal don yin aiki da Tsarin Tsarin, da kuma rashin nasarar Spain don kiyaye shi ya haifar da Yaƙin Peninsular da barkewar Yaƙin Ƙungiyar ta Biyar. Faransawa sun mamaye Spain kuma sun kafa masarautar Spain, suna kawo karshen kawance tsakanin su biyun. Ba da daɗewa ba Birtaniya ta shiga cikin yankin Iberian Peninsula yayin da ƙoƙarin Birtaniya na kama Antwerp ya kasa. Napoleon ya lura da halin da ake ciki a Iberia,
cin nasara da Mutanen Espanya, da kuma fitar da Birtaniya daga Peninsula. Austria, da ke son dawo da yankin da aka rasa a lokacin Yaƙin Ƙungiyar ta Uku, ta mamaye jihohin Faransa a Gabashin Turai. Napoleon ya kayar da haɗin gwiwa na biyar a Wagram.