Artificial Intelligence (AI) is predicted to play an increasingly central role in warfare, with weaponized robots taking over more battlefield operations, and military algorithms mediating in, or substituting for, human decision-making in areas such as intelligence collection and analysis, targeting, and strategic decision-making. The primary focus of this article is the potential impact of the widespread use of AI systems on soldiers and military leaders themselves – namely, on their moral character, skills, emotions, and agency – and on how they (...) are perceived by the society which they defend. Increasing the use of AI in the military may undermine the conditions necessary for the cultivation and practice of martial virtues and commitment to the common good. The essay focuses on the three virtues of courage, deep loyalty, and prudence or practical wisdom. It then asks what kinds of “technocratic” vices might be encouraged in warfighters by the use of AI systems. It closes by analyzing the wider social and political implications of an expansive use of AI in the military. The risk is that, as AI takes over more military functions, the military ceases to be seen as a civic and republican institution and instead is seen as a mere extension of technocratic power. (shrink)