This article first appeared on The War Horse, an award-winning nonprofit news organization educating the public on military service. Subscribe to their newsletter. When Mayra Diaz opened the door of her Army barracks room in 2022, she didn’t realize it was the beginning of the end of her military career. She had never met the soldier standing in front of her, Sgt. Greville Clarke. She didn’t know he had sexually assaulted three other women on b…