Derpy is a quiet pony in town. So, it makes sense that one of her war stories isn't in the front of public consciousness, not that she would want it to be. At one time Derpy was in control of the world's most powerful weapons and a unfortunate series of events led to one of the darkest days in Equestrian military history. Where she fights off two bogies while also fighting her subordinates and her better judgement from turning the launch key.