Ender's Game (Ender Wiggins Saga)

understand.
      "M.D. The initials stand for Medical Doctor, too. M.D. Device, therefore Dr. Device. It was a joke." Ender didn't see what was funny about it.
     
     
     
      They had changed the simulator. He could still control the perspective and the degree of detail, but there were no ship's controls anymore. Instead, it was a new panel of levers, and a small headset with earphones and a small microphone.
      The technician who was waiting there quickly explained how to wear the headset.
      "But how do I control the ships?" asked Ender.
      Mazer explained. He wasn't going to control ships anymore. "You've reached the next phase of your training. You have experience in every level of strategy, but now it's time for you to concentrate on commanding an entire fleet. As you worked with toon leaders in Battle School, so now you will work with squadron leaders. You have been assigned three dozen such leaders to train. You must teach them intelligent tactics; you must learn their strengths and limitations; you must make them into a whole.”
      "When will they come here?”
      "They're already in place in their own simulators. You will speak to them through the headset. The new levers on your control panel enable you to see from the perspective of any of your squadron leaders. This more closely duplicates the conditions you might encounter in a real battle, where you will only know what your ships can see.”
      "How can I work with squadron leaders I never see?”
      "And why would you need to see them?”
      "To know who they are, how they think--”
      "You'll learn who they are and how they think from the way they work with the simulator. But even so, I think you won't be concerned. They're listening to you right now. Put on the headset so you can hear them.”
      Ender put on the headset.
      "Salaam," said a whisper in his ears.
      "Alai," said Ender.
      "And me, the dwarf.”
      "Bean.”
      And Petra, and Dink; Crazy Tom, Shen, Hot Soup, Fly Molo, all the best students Ender had fought with or fought against, everyone that Ender had trusted in Battle School. "I didn't know you were here," he said, "I didn't know you were coming.”
      "They've been flogging us through the simulator for three months now," said Dink.
      "You'll find that I'm by far the best tactician," said Petra. "Dink tries, but he has the mind of a child.”
      So they began working together, each squadron leader commanding individual pilots, and Ender commanding the squadron leaders. They learned many ways of working together, as the simulator forced them to try different situations. Sometimes the simulator gave them a larger fleet to work with; Ender set them up then in three or four toons that consisted of three or four squadrons each. Sometimes the simulator gave them a single starship with its twelve fighters, and he chose three squadron leaders with four fighters each.
      It was pleasure; it was play. The computer-controlled enemy was none too bright, and they always won despite their mistakes, their miscommunications. But in the three weeks they practiced together, Ender came to know them very well. Dink, who deftly carried out instructions but was slow to improvise; Bean, who couldn't control large groups of ships effectively but could use only a few like a scalpel, reacting beautifully to anything the computer threw at him; Alai, who was almost as good a strategist as Ender and could be entrusted to do well with half a fleet and only vague instructions.
      The better Ender knew them, the faster he could deploy them, the better he could use them. The simulator would display the situation on the screen. In that moment Ender learned for the first time what his own fleet would consist of and how the enemy fleet was deployed. It took him only a few minutes now to call for the squadron leaders that he needed, assign them to certain ships or groups of ships, and give them their assignments. Then, as the battle progressed, he would skip from one leader's point of view to another's, making suggestions and, occasionally, giving orders as the need arose. Since the others could only see their own battle perspective, he would sometimes give them orders that made no sense to them; but they, too, learned to trust Ender. If he told them to withdraw, they withdrew, knowing that either they were in an exposed position, or their withdrawal might entice the enemy into a weakened posture. They also knew that Ender trusted them to do as