As many as 30 percent of women serving in the military are raped or experience an attempted rape, advocates say.

But relatively little detailed documentation has been made public, and the American Civil Liberties Union of Connecticut and the Service Women’s Action Network, backed by a Yale Law School legal clinic, have had a long-running legal battle with the Department of Defense over access to millions of pages of military records. Their efforts were recently thwarted again by a recent ruling of the U.S. Court of Appeals for the Second Circuit.