The Spaniards, who did not have an integrity in their lands and had a dispersed political structure, could keep their monarchies alive, they were dependent on preserving the "Spanish Road" to connect their existing lands. Therefore, it has become one of the primary policies of the monarchy to secure the route of this road, which connects geographies such as Low Countries, Milan, Sicily, Naples, Spain, Alsace-Loren and Franche-Comté and unifies that dispersed structure. Especially, Spaniards were able to extend a single corridor from Barcelona to Brussels in order to distribute soldiers, money and other necessary items from this road, which gained vital importance with the Low Countries Revolt in the middle of the 16th century. However, in 1627 the death of the ruler of the Duchy of Mantua & Montferrat named Vincenzo di Gonzaga II put the Spaniards who were aiming to secure the "Spanish Road" in a difficult situation. The Spaniards, who tried to bind this duchy to themselves in order to ensure the security of the "Spanish Road", could not succeed in this issue and by that unsuccessful step some states such as France, Savoy, Venice and the Holy Roman Empire were able to intervene in this region. Naturally, the existence of other states in Northern Italy caused the Spaniards to lose their power and control in the region. This failure of the Spanish monarchy did not only lead the Spaniards to lose control of Northern Italy; but also it got the entire monarchy out of control. In other words, this fire in the heart of the monarchy created the breaking point called El Gran Viraje on behalf of the Spaniards.