Lt. Col. Juanita L. Warman, 55, of Havre De Grace, Maryland. She was assigned to the 1908th Medical Company, Independence, Missouri.
Maj. Libardo Eduardo Caraveo, 52, of Woodbridge, Virginia. He was assigned to the 467th Medical Detachment, Madison, Wisconsin.
Capt. Russell Seager, 41, of Racine, Wisconsin. He was assigned to the 467th Medical Company, Madison, Wisconsin.
Spc. Frederick Greene, 29, of Mountain City, Tennessee. He was assigned to the 16th Signal Company, Fort Hood, Texas.
Capt. John Gaffaney, San Diego, California
John Gaffaney, a 56-year-old Army reservist, was a psychiatric nurse and worked for two decades in San Diego County, California, where he helped elderly victims of abuse and neglect.
Ellen Schmeding, assistant deputy director of the county's Aging and Independence Services Department, told CNN affiliate KFMB that Gaffaney most recently served as a supervisor for the county's Adult Protective Services Department.
"Everybody is quite shocked and shook up over what happened," Schmeding said.
Gaffaney, the father of a grown son, traveled to Fort Hood this week for a yearlong overseas deployment. Before he worked for the county, he had been in the Army, where he earned the rank of major, Schmeding said.
Schmeding said Gaffaney "really felt he could make a difference" serving members of the armed forces.
He will be "sorely missed," she said.
Army Staff Sgt. Justin DeCrow, Plymouth, Indiana
Justin Decrow, 32, was a "loving husband and father, and we're going to miss him," sobbed his wife, Marikay DeCrow, from their home in Evans, Georgia.
The couple has a 13-year-old daughter.
DeCrow went to Fort Hood in September to prepare for his deployment to Iraq, which was scheduled for sometime between December and March, Marikay Decrow told CNN.
He had just come back from a tour in South Korea, where he worked in satellite communications, she added.
Daniel DeCrow, Justin DeCrow's father, told CNN affiliate WSBT in South Bend, Indiana, that his son joined the Army after finishing high school in Plymouth, Indiana.
He last spoke to his son last week, WSBT reported.
"As usual, the last words out of my mouth to him were that I was proud of him," Daniel DeCrow said, according to WSBT's Web site. "That's what I said to him every time -- that I loved him and I was proud of what he was doing. I can carry that around in my heart."
Chief Warrant Officer Michael Grant Cahill (Ret.), Cameron, Texas
Michael Cahill, 62, liked his job as a physician's assistant at Fort Hood so much that he only took one week of recovery time after undergoing heart surgery, his sister told CNN affiliate KREM.
Cahill, who served in the Army Reserve, previously worked as a registered nurse, Marilyn Attebery told KREM. He later returned to school to pursue a career as a physician's assistant, she said. Cahill was assisting with physicals for soldiers preparing for deployment at the time of the shooting, his sister said.
"I'm just upset for all the families and for what went on here. They're talking about wars and show wars and it's right there in Fort Hood and it's just devastating to everybody and all the families," Attebery told KREM.
Cahill is survived by his wife, Joleen, three children and a grandson, Attebery said.
Spc. Jason Dean Hunt, Tipton, Oklahoma
Hunt, 22, wanted to be part of something greater than himself, his sister Leila Willingham told CNN. He enlisted in the Army in 2006 and spent his 21st birthday in Iraq, she said. He chose to re-enlist, dedicating the next six years to the military.
"I think that says a lot for that kind of man who makes that kind of choice for his country," Willingham said.
Willingham sobbed as she talked about the love she had for a brother she was "super proud" of.
Hunt was recently married and set for his second deployment to Iraq, his sister told CNN's "Larry King Live."
Hunt graduated high school in 2005 and tested his hand at a career in information technology, Willingham said. But he had a different calling.
"I really feel like when he enlisted in the Army he fulfilled that part of himself that wanted to serve other people and live for something greater than himself," she said.
Willingham said she doesn't know the details of her brother's death, but wants to believe he died trying to save others. "It's something he'd do," she said.
Sgt. Amy Krueger, Kiel, Wisconsin
Amy Krueger, 29, was a high school athlete who joined the military after the September 11, 2001, attacks, Kiel High School Principal Dario Talerico told the Milwaukee-Wisconsin Journal Sentinel.
"I know she was proud to serve and proud to share her experience," Talerico told the newspaper. "She took pride that she was able to serve her country."
Krueger played for the high school basketball and softball teams and graduated in 1998, Talerico said.
A high school friend who later shared an apartment with Krueger had fond memories of the sergeant.
"She was one of the best people you could have ever met," Carrie Marie Senkbeil told the newspaper.
Pfc. Aaron Thomas Nemelka, West Jordan, Utah
Aaron Nemelka, 19, graduated from high school and enlisted in the military in the same year -- 2008. He was set to deploy to Afghanistan in January, his family told CNN affiliate KUTV.
Nemelka, the youngest of four children, was happy to offer his service, the family said in a letter read aloud by Lt. Col. Lisa Olsen of the National Guard to KUTV.
"Aaron was very happy as a combat engineer. He was anxious to be deployed to Afghanistan in January."
Family members said they were devastated by their loss.
Nemelka's uncle, Maj. Michael Blades, read a statement from his nephew's family.
"Aaron was very proud to serve in the military," Blades said, adding that many others in his family had also served in the armed forces.
"His mission is completed in this life. He now serves a higher calling in heaven," Blades read. "We love him, we miss him, and we look forward to that glorious day when the family will be reunited with him."
Nemelka had a girlfriend and he may have had plans to marry her, KUTV reported.
Pfc. Michael Pearson, Bolingbrook, Illinois
Michael Pearson, 22, enlisted in the Army more than a year ago to realize his musical dream. He hoped the military would be his path to college, where he could study musical theory, his brother Kristopher Craig told CNN affiliate WGN-TV in Chicago, Illinois.
"He was a genius as far as we were concerned," Craig told WGN-TV, reeling from the news that his 21-year-old "little kid brother" was dead.
"He was really living his life playing guitar," Craig said. "When he picked up a guitar, we all understood that he was expressing himself."
Pearson was scheduled to deploy either to Iraq or Afghanistan in January, his brother said. He was learning to deactivate bombs and training in the Mojave Desert, said his mother, Sheryll Pearson. She was looking forward to seeing her son at Christmas.
He was shot three times in the spine and chest and died on the operating table, she said, according to TV affiliates in Chicago.
"His father is still in shock and very angry," Sheryll Pearson said. "We're all very angry."
Craig, who also had been stationed at Fort Hood and now serves in the Illinois National Guard, said he cannot accept a fellow soldier gunned down his brother.
"It's unfathomable," he said. "I couldn't imagine something like that -- attacking another soldier. It's just ridiculous. I don't understand it."
Pvt. Francheska Velez, Chicago, Illinois
Francheska Velez, 21, lived the dream her father never realized.
Velez enlisted three years ago, an act her father Juan Guillermo Velez always wanted to accomplish, he told CNN affiliate WGBO. He encouraged his three-months pregnant daughter to stick with the military after she gave birth.
"My advice to her was to continue with her career in the military after she had her child," he told WGBO. "Then she would tell me, 'Daddy,' always with a smile on her face, which I will never forget, 'I will continue with my military career.' That was a dream that she made happen for me."
Francheska Velez had recently returned from Iraq and was transferred to Fort Hood last week because she was pregnant, her father said.
In the wake of his loss, Juan Velez struggled to comprehend why.
"It's a very difficult slap because you understand if it was terrorists or if it happened over there during the war. What hurts the most is that one of her own killed her and in her own house, the base where there should have been security."
Spc. Kham Xiong, St. Paul, Minnesota
Kham Xiong, 23, was preparing for his first deployment since joining the Army, his sister told CNN affiliate KARE.
Xiong enlisted last year and was scheduled to deploy to Afghanistan in January, Mee Xiong said.
She thinks her brother was at the site of the shooting because he was getting a medical checkup and vaccinations, she said.
With another brother serving in Afghanistan, the news of Kham Xiong's death is "hard on the family," his sister said.
"He is a loving person, everyone loves him and adores him," Mee Xiong told KARE.
Her brother was a father of three, KARE reported.