The two-year-old war in Ukraine—which is far from deadlocked—could pivot dramatically in the coming months. U.S. decisions will play a decisive role.

The advanced U.S. fighter aircraft will mark a significant upgrade to Ukraine’s air force, but their impact on the war with Russia will hinge on several factors.

The country’s steady military and technological progress, coupled with its leader Kim Jong Un’s increased hostility toward foreign influences, raises concern about Pyongyang’s ambitions. Here’s a bre…

The rapid pace of North Korean diplomacy makes it crucial that Japan and South Korea coordinate more closely on potential changes to Northeast Asian security. But they must first overcome some deep-r…