Some of the victims "had to find civilian doctors to get proper medical treatment" and the military has not assigned liaison officers to help them coordinate their recovery, the group's lawyer, Reed Rubinstein said in February.
"There's a substantial number of very serious, crippling cases of post-traumatic stress disorder exacerbated, frankly, by what the Army and the Defense Department did in this case," said Rubinstein. "We have a couple of cases in which the soldiers' command accused the soldiers of malingering, and would say things to them that Fort Hood really wasn't so bad, it wasn't combat."
Some of the victims in the lawsuit said they believe the Army Secretary and others are purposely ignoring their cases out of political correctness.
"These guys play stupid every time they're asked a question about it, they pretend like they have no clue," Shawn Manning, who was shot six times that day at Fort Hood, said in ABC News' original report.
"It was no different than an insurgent in Iraq or Afghanistan trying to kill us," said Manning, who was twice deployed to Iraq and had to retire from the military because of his injuries.
An Army review board initially classified Manning's injuries as "combat related," but that finding was later overruled by higher-ups in the Army. Manning says the "workplace violence" designation has cost him almost $70,000 in benefits that would have been available if his injuries were classified as "combat related."
"Basically, they're treating us like I was downtown and I got hit by a car," he told ABC News.
Pentagon Press Secretary George Little has said the Department of Defense is "committed to the highest care of those in our military family."
"Survivors of the incident at Fort Hood are eligible for the same medical benefits as all service members," said Little. "The Department of Defense is also committed to the integrity of the ongoing court martial proceedings of Major Nidal Hasan and for that reason will not at this time further characterize the incident."
A spokesman for new Defense Secretary Chuck Hagel, who was appointed to the position after ABC News' report aired, said the department's position has not changed.