Answer:
convincing yeomen of their shared interests.
Step-by-step explanation:
Yeomen was the people who are considered to be 'middle class', they are not particularly poor but they do not have as much influence as the elite has.
By convincing the yeomen that they shared interests, the elite class can easily influence the middle class into doing something that benefit them by creating the narration that it is the best course of action for all class in society. Most of the yeomen did not even realized that they are only used as puppets by the elites.