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.

South Korea hopes to solidify its image as modern and efficient as host of the winter games, but its success relies heavily on cooperation from the North.

Reports that China has stepped up efforts to gain influence in foreign political systems have sparked concern in Australia, New Zealand, and other states amid signs that the campaign may be shaping d…