sentences:  In 1531, the family acquired the vacant Marquisate of Montferrat through marriage.In 1627, Duke Vincent II deceased without heirs, ending the original line of Gonzagas.From 1628 to 1631, a succession war was fought between the Duke of Guastalla, supported by the Holy Roman Empire, and the Duke of Nevers, supported by France, for the control of the Duchy of Mantua.