Sinking warships with “kamikaze”-like strikes, attacking critical infrastructure, and “swarming” together to overwhelm enemy defenses, Ukraine’s Magura drone boats have had success countering Russian naval forces in the Black Sea — despite its Navy’s markedly limited resources. These autonomous maritime vessels are having a moment, and the Pentagon and weapons industry alike want in on it. Flush with cash from venture capitalists and, increasingly, the DoD, which has awarded hun...