It contributes to the difficulty in getting other Americans to join the volunteer military. The Army struggles to find enough recruits each year and to keep career soldiers.
Thousands more troops each year struggle with mental health problems because of the combat they've seen. The lengthening of duty tours to 15 months from 12 a year ago also has been blamed for problems as has the fact that soldiers are being sent back for two, three or more times.
President Bush will announce on Thursday that the length of tours will go back to 12 months for Army units heading to war after Aug. 1, defense officials said Wednesday.
Some 27 percent of soldiers on their third or fourth combat tours suffered anxiety, depression, post-combat stress and other problems, according to an Army survey released last month. That compared with 12 percent among those on their first tour.
In Afghanistan a range of mental health problems increased, and 11.4 percent of those surveyed reported suffering from depression.
Medical professionals themselves are burning out and said in the survey that they need more help to treat the troops. The report also recommended longer home time between deployments and more focused suicide-prevention training. It said civilian psychologists and other behavioral health professionals should be sent to the warfront to augment the uniformed corps.
Though separate data reported on divorce rates appeared to be holding steady last year, soldiers say they are having more problem with their marriages due to the long and repeated separations.
As many as 121 troops committed suicide in 2007, an increase of some 20 percent over 2006, according to preliminary figures released in January.
If all are confirmed that would be more than double the 52 reported in 2001, before the Sept. 11 terrorist attacks prompted the Bush administration to launch the war in Afghanistan.