Sand Box Brawl-Halle's your girl!

Halle likes the sand box at the park; but, so do the other kids playing there. She likes to build sand castles and direct others not to touch them. (At times she can be a little bossy, okay a lot bossy.) Halle's Sand Box Etiquette states, "If you throw sand at her once, her mistake. If you do it twice, your very bad mistake." I think that other girl will think twice before breaking Halle's Sand Box Etiquette Rules again. I was pushing Makayla in the swing and this is what I saw. Halle's sand castle was nice and built and she was protecting it, by directing others away. No problem until a girl threw sand at her. Halle simply said, "Don't do it again." She did it again, to my surprise Halle said, "Don't, and I mean it." I guess those warnings weren't enough; the little girl did it again. Halle jumped up at super sonic speed, grabbed the girl with both arms and threw her to the ground. She then took a hand full of sand and at point blank threw it in her face. I got involved at this point and made her come to me. Before she did she said, "I told you not to." When we left 5 minutes later the little girl was still crying and her mom was still picking sand from her teeth and eyes. My question is: Do you make your child apologize when the other kid asked for it? I didn't.