what dictatorial actions does Napoleon carry out in response to boxers doubt and to what effect

Napoleon calls an assembly. He wears the medals of “Animal Hero, First Class” and “Animal Hero, Second Class,” which he has awarded himself. Napoleon’s dogs drag out of the crowd the four pigs that had opposed the cessation of Sunday meetings. The dogs try to drag Boxer out as well, but he deflects them. The pigs confess that they collaborated with Snowball in destroying the windmill and were planning to help Mr. Frederick overtake Animal Farm. They also confess to knowing of Snowball’s partnership with Mr. Jones for years. Then the dogs tear out the four pigs’ throats. Napoleon asks whether any other animal wishes to confess. Three hens, which had led the hen rebellion, confess that Snowball incited them to revolt in a dream vision. After this, several other animals confess to crimes both great (murder) and small (stealing). Napoleon has them all murdered. After the public executions, the horrified animals slink away. Boxer blames the evil among them to some “fault” in themselves and suggests that the way to quash it is to work harder.