The battle of Pavia on February 24, 1525 was a revolutionary event, and the first major European battle in terms of army composition and geopolitical scale of operations and objectives. Moreover, it was a battle in which a new technology – the firearm – was employed for the first time in campaign and in which the populace was pitted against the nobility. Today’s war in Ukraine, like the battle of Pavia at the time, has opened up some new perspectives: political ones, i.e., the debate it has triggered on European defense, as well as technological ones on the future of security.