What changes Ender's perception of his first meeting with the Salamander Army?

In the novel, Ender’s Game by Orson Scott Card, Ender is initially nervous or scared to be assigned to an army as a brand new "launchie", but he begins to get excited about the opportunity. As he tries to assimilate into the army he faces many obstacles as the older boys resent him and doubt his ability. He is ordered to enter every battle last, and he is allowed to do nothing but homework. He watches how the armies win and are defeated, and he realizes he is much smarter mentally, but less strong physically than the other soldiers. This causes him to start a group of his own, and they become the crew who join Enger to eventually beat the buggers.