Taking an international law perspective, Ashley Deeks, Noam Lubell, and Daragh Murray highlight the potential legal, policy, and ethical challenges that will arise as governments inevitably begin to employ artificial intelligence and machine learning algorithms to inform their use of force decisions. The authors identify critical questions states should contemplate before developing such algorithms, underscoring that machine learning algorithms could both improve the accuracy of use of force decision making and present negative consequences for states, and recommend prophylactic measures for states as they develop and eventually deploy these tools.