Kammala wannan jumla: A shekara ta 1627, Duke Vincent II ya mutu ba tare da magaji ba, yana kawo ƙarshen asalin Gonzagas. Daga 1628 zuwa 1631, a
An yi yaƙin nasara tsakanin Duke na Guastalla, wanda Empire Roman Empire ke tallafawa, da Duke na Nevers, wanda Faransa ke tallafawa, don ikon Duchy na Mantua. A ƙarshe, Duke na Nevers an gane shi ne kawai Duke.