The new U.S. aid package will reestablish a critical flow of weapons to Ukraine’s military, but the war will hinge greatly on which side can ramp up and sustain its firepower and troop numbers in the…

Russia’s early setbacks in its invasion of Ukraine could have foreclosed on some of President Vladimir Putin’s sweeping war objectives, but he is unlikely to relent given the conflict’s momentum.  

The death toll from the Israel-Hamas war continues to mount, with no lasting settlement in sight. Meanwhile, concerns about humanitarian catastrophe and regional violence are spreading.

The transatlantic alliance has begun to connect its traditional security interests in Europe with the geopolitical dynamics in the Indo-Pacific region, including tensions between China and Taiwan.

U.S. administrations have backed sweeping efforts for societal change in the Middle East in recent decades, with poor results. But Washington can still achieve more modest, essential goals in the reg…

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.

After the rise of Chinese power during the 2010s and failed U.S. policies in the Indo-Pacific, the United States should renew the Pivot to Asia and place the region at the center of its grand strateg…

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 reelection of Iran’s Hassan Rouhani, as well as U.S. President Donald J. Trump’s strong affirmation of ties with Sunni Arab states, sets the stage for an intense new round of competition in the M…