In the historical situation of that time, in the Naples war, which affected mainly France and Spain, but also the Germanic Empire, the Papal States, the Ottoman Empire and the Italian State Cities, it was essential to keep the secrecy in the negotiations in military strategies and even in betrayals, and any neglect at one point could disrupt strategies.

These two letters, now analysed, allow experts to fully understand the military instructions and tactics discussed by the King Ferdinand II and his commander.

We also understand better the kind of threats they were fearing.