What are the two major events in Chapter 2 LAW OF CLUB AND FANG ?

The good-natured Curly is killed simply for trying to make friendly advances towards a husky dog only half her size. The dog takes her down with efficient, quick technique. Once it is certain that Curly will not rise again, the rest of the dogs in the camp attack and kill her. Spitz, the lead dog of Buck's team, laughs. Buck hates him bitterly. He has learned that fair play does not exist, and he resolves that he will never go down.

The first time he is harnessed to the sled, his dignity is hurt but he is "too wise to rebel." Dave, an experienced wheeler, nips at Buck whenever he is making mistakes. Spitz growls at him warningly from his front post.