Fluttershy is the Element of Kindness. So of course when it comes to leading a war against Princess Celestia, she can't always be the one to save the other fallen ponies. She also has to cope with her feelings for one of the soldiers, one who can die at any moment. A sequel to the story, Elements (http://www.fimfiction.net/story/57634/Elements), as it follows the Four Year War of Equestria.