At least 100 Americans have gone — and some continue to go — to Syria to fight against ISIS. Many have joined a Kurdish militia group called the People's Protection Units or the YPG. What these volunteers are doing isn't illegal, but it raises many questions.
The Navy removed a fleet's commander after another deadly collision. It's also putting all international operations on hold to remind its sailors of the fundamentals of seamanship.
Just over a year after President Barack Obama introduced a new policy to allow transgender people to serve openly in the US military, President Donald Trump is reinstating a ban on transgender service members.
Veterans tell us what they think of a plan that might increase the US presence in Afghanistan.
President Barack Obama signaled his concern about civilian casualties in the Yemen war on December 13 when he halted a major resupply of smart bombs to the Saudi Arabian air force. But the same day, the US Air Force delivered the Saudis four new fighter jets.
President-elect Donald Trump's tweet about a US-made fighter jet, the F-35, caused its manufacturer's stock to tumble. Here's why critics of Lockheed Martin's Joint Strike Fighter program say that the plane, designed to be efficient and economical, is neither.
Donald Trump named retired four-star Marine Gen. John Kelly to head the Department of Homeland Security. If confirmed by the Senate, Kelly would join retired Marine Gen. James Mattis as defense secretary and retired Army Lt. Gen. Michael Flynn as national security adviser.
Despite assurances from the US and South Korean governments, South Koreans living near the site of a new anti-missile shield worry about potential health impacts.
Brooks, the author of the new book "How Everything Became War and the Military Became Everything," reflects on how the lines between war and peace have blurred since 9/11.