To gain and consolidate his power, Napoleon uses several techniques. With Snowball, he adapts Old Major's political philosophy. That's the first step. He fights the human farmer, a direct blow for power. He gives orders, starting with the order to harvest the crops. He and Snowball put forth resolutions on a regular basis, getting the animals used to them organizing things. He grooms the dogs to serve him, using direct violence on his followers to keep power. He lies, of course, and changes history, and makes alliances with humans.