The number of Army suicides rose dramatically between 2004 and 2008.
A study from the U.S. Army Public Health Command shows projected suicide rates among soldiers had declined slightly since 1977, but rose 80-percent after 2004.
Researchers say around 40-percent of those suicides might be associated with military events following U.S. involvement in Iraq. About two-thirds of the cases involved service members who'd been deployed in active combat.
During 2007 and 2008, 255 soldiers on active duty took their own lives, equivalent to an actual suicide rate of 20 per 100,000 person years, compared with the expected rate of 12 per 100,000 person years.