How is comradeship explored in the novel?

While war certainly can bring out the worst in us, Remarque is equally interested in how, paradoxically, it can also bring out the best. How is comradeship explored in the novel? Look at Paul's friendship with his fellow soldiers. How has war created a bond between these young men that peace never could? Paul's friendship with Kat is another relationship worth exploring in respect to this question. Likewise, the scene with the goose dinner explicates this theme quite strongly, as does the scene in which Paul is trapped in Chapter 9.