Between the 50's and 1987?
http://www.militarytimes.com/story/veterans/2015/12/17/va-change-disability-claims-rules-camp-lejeune-veterans/77486076/
http://www.militarytimes.com/story/veterans/2015/12/17/va-change-disability-claims-rules-camp-lejeune-veterans/77486076/