One further casualty of the Iraq war: according to the Army, from 2003 when the war began to the following year, more than 3,000 soldiers got divorced, a 78% increase in one year.
War has always been hard on marriages. As the military has gotten more married, the armed forces have of necessity become more involved in supporting marriages in order to retain volunteer soldiers. This makes the war's toll on military marriages a more significant problem for the armed forces. No one, to my knowledge, has calculated the effect of divorce on re-enlistment, but it surely can't be good.
The military's family support apparatus gets bigger, and more necessary, year by year. The Iraq war is the biggest test that the military family system has faced in the all-volunteer era. The fall-out will continue for years to come.