"Our families have really sacrificed much more than any of us could have, and it's really hard to -- thanks ain't enough, but it's all we can say to them," Col. Robert Adams told ABC News' Martha Raddatz in June 2005.
Spouses of troops deployed in Iraq say they all share a bond.
"It creates a bond. They know your experience. They share that sense of loss, and the grieving, and they don't tell you to just move on," Tracy Cunningham told ABC News in May, 2005. "You can't just move on. Everybody here at Fort Hood will say, 'if you need something, call us.' And they meant it. They take care of you."
The Fort Hood's Darnall Army Hospital, where the suspect in today's shooting is expected to have been stationed, opened its door in April 1965.
The 1st Cavalry Division can trace its history back to the 1850's, when it engaged in battles against Native Americans.
ABC News' Martha Raddatz, Lisa Chinn and Sarah Netter contributed to this report.