Legal principles matter as two major democracies—Taiwan and Ukraine—are threatened by superpower neighbors. Whether one argues about Taiwan’s status as a country or a province of China, it is a vibra…

If conflict were to break out between China and Taiwan, the latter’s right to defend itself would hinge on its international legal status and the circumstances of the hostilities.

Israel has long been the leading recipient of U.S. foreign aid, including military support. That aid has come under heightened scrutiny amid Israel’s monthslong war to eliminate Hamas.

U.S. aid is critical not just for Ukraine, but for U.S. credibility in Russia and beyond.

The U.S. secretary of state appears to have one foot out the door—and that’s exactly what U.S. diplomats have been waiting for.

Iran’s web of armed partners such as Hezbollah and the Houthis serves to strengthen its influence in the Middle East and could pose a significant threat to the United States and U.S. allies in the re…

Drone technology has been used extensively in twenty-first-century armed conflict, but the Russia-Ukraine war is driving innovations in autonomous warfare not seen on other battlefields.