How does Napoleon seize power in Animal Farm?

In the middle of a meeting in chapter 5, Snowball stands in front of the animals and elaborates on his extensive plans to built a windmill, which would produce electricity on the farm and reduce the amount of physical labor needed to complete various tasks. Snowball is able to persuade the animals during his speech, and Orwell writes that the animals were about to vote for Snowball's plan when Napoleon calls for his dogs. Immediately, nine ferocious dogs run into the barn and attack Snowball. Snowball manages to escape from the barn and is chased off the farm by Napoleon's dogs. The dogs then return to the barn and faithfully stand at attention next to Napoleon, grimacing at the other animals. Napoleon then announces that Sunday-morning meetings are canceled, and a committee of pigs will decide on all matters regarding work on the farm. When several pigs attempt to protest, the nine ferocious dogs growl and intimidate them into remaining silent. Later that day, Squealer travels around the farm spreading false propaganda and convincing the animals that Napoleon's leadership is in their best interest. Essentially, Napoleon uses force and false propaganda to usurp power and rule the farm like a tyrant.