As war rages in Israel and Ukraine, Iran is supplying both Hamas and Russia with weaponry, especially combat drones. And for decades now, it has armed Islamist militants across the Middle East that target American troops, including at least 45 service members injured by 38 drone attacks since Oct. 17.

If the United States wants to reestablish global security and end the conflicts in these regions, it will need to understand the military connections among adversaries and work to subvert them.