Untreated and undiagnosed, the crews that save lives in the roughest seas face the relentless pounding of waves.

The Defense Department said 4,240 service members, or about 0.2 percent of those in uniform, have a diagnosis of gender dysphoria. Previous estimates had put the number at triple that figure.

Military.com helps millions of military-connected Americans access military and veteran benefits and news, find jobs and enjoy military discounts.

Mandates in the annual appropriations act, passed on Wednesday, call for the Pentagon to track and mitigate risks to troops’ brains from firing their own weapons.

Funding its war against the United States, the Taliban reaped millions from boom towns trading opium, heroin and meth. Victorious, the group crushed the trade, leaving ghost towns in its wake.

For more than a century, people have climbed on top of moving trains in search of a thrill. Now social media has attracted a new generation of daredevils.

Unable to find effective treatments at home, veterans with brain-injury symptoms are going abroad for psychedelics like ibogaine that are illegal in the U.S.

The Pentagon is temporarily pausing flights again of its V-22 Osprey fleet after weakened metals in a part inside one of the aircraft broke apart in flight in November, causing an engine failure and a...

Google unveiled an experimental machine capable of tasks that a traditional supercomputer could not master in 10 septillion years. (That’s older than the universe.)

A confidential Navy program is studying whether intense fighter jet operations can cause devastating brain injuries in flight crews.

Three military deployments reshaped the views of President-elect Donald J. Trump’s pick to lead the Defense Department.

President-elect Donald J. Trump’s pick to lead the Defense Department was described by peers as a skillful soldier who became embittered by military dysfunction.

The Osprey is back in the air after being grounded for months following a crash last November that killed eight U.S. service members in Japan. But there are still questions as to whether it should be.

Officials said that the suicide rate among troops has increased steadily over the last decade.

The pounding that sailors’ brains take from years of high-speed wave-slamming in the Special Boat Teams can cause symptoms that wreck their careers — and their lives.