Rubuta ci gaba don wannan sakin layi - A lokaci guda, ƙin yarda da Portugal don yin aiki da Tsarin Tsarin Kasashen Duniya, da kuma rashin nasarar Spain don kiyaye shi ya haifar da Yakin Peninsular da kuma barkewar Yakin na 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 kula da halin da ake ciki a Iberia, ya ci nasara da Mutanen Espanya
, da kuma fitar da Birtaniya daga yankin. 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.