The untold casualties of a war...

WASHINGTON - Some 300,000 U.S. troops are suffering from major depression or post-traumatic stress from serving in the wars in Iraq and Afghanistan, and 320,000 received brain injuries, a new study estimates.

Only about half have sought treatment, said the study released Thursday by the RAND Corporation.

“There is a major health crisis facing those men and women who have served our nation in Iraq and Afghanistan,” said Terri Tanielian, the project’s co-leader and a researcher at the nonprofit RAND.

“Unless they receive appropriate and effective care for these mental health conditions, there will be long-term consequences for them and for the nation.”