Korean War, a ‘Forgotten’ Conflict That Shaped the Modern World

The three-year conflict set the stage for decades of tension on the Korean Peninsula, but today many Americans know little about it.

Trump National Security Strategy Sees U.S. Confronting China and Russia

The strategy the president plans to outline Monday is at odds with his often-warm relations with the leaders of China and Russia.

How ISIS Produced Its Cruel Arsenal on an Industrial Scale

When the Islamic State seized territory in Iraq and Syria, it had the time and space to industrialize advanced weapons manufacturing. The results included explosive space heaters and chemical rockets.

Tensions Build in Jerusalem and Beyond Over Trump Declaration

Security forces braced for more demonstrations against the U.S. decision to recognize the city as Israel’s capital.

Flynn’s Guilty Plea, a Timeline

The guilty plea by Michael T. Flynn, President Trump’s former national security adviser, brings the investigation of Russian interference in the 2016 election into Mr. Trump’s inner circle.