Thomas Brennan joined the Marine Corps in 2003. He was deployed to Iraq and then later Afghanistan.
[Ads /]
But the battle he faced when he returned home was the hardest of all.
It came from the traumatic brain injury he suffered after he was wounded by a rocket-propelled grenade while on active duty.
"I really couldn't see a future for myself," Brennan said. "My self worth was gone, it was hard for me to see a future after I took the uniform off."
Watch the video above to learn about how he found new purpose while continuing to serve his community.
[Ads /]
More about how Traumatic Brain Injuries affect military members:
Traumatic Brain Injuries in military members
You have told us that mental health is one of your top concerns so we are devoting resources to bringing you a new series covering some of the many aspects of mental health. From stories about our fellow community members whose lives have been impacted by addiction and depression, to the resources, programs, and facilities that are available to help you and your loved ones.
We welcome your feedback and tips for stories that you would like to see. You can send those to us here.