The first betrayal of Caesar can be seen at the very beginning of the play, when Flavius and Marcillus sent the commoners away then proceeded to take the scarves off of the statues celebrating Caesar. They made the comment, "These growing feathers pluck'd from Caesar's wing will make him fly an ordinary pitch," (Act 1, Scene 1). In other words, the two conspirators feel that sending away Caesar's followers will give Caesar a reality check of sort and bring his ego down.
The next example of betrayal can be seen by Cassius working to get Brutus to his side, away from believing in Caesar. He does this first by sending him a fake letter and proceeds to tell him about the reason why he is so distraught, that he feels betrayed by Caesar. He tells Brutus about a time before when they were swimming across the Tiber River and Caesar was almost drowning, calling out, "Help me, Cassius, or I will sink!" (Act 1, Scene 2). He describes how he saved Caesar's life, then tells Brutus, "and this man is now become a god, and Cassius is a wretched creature and must bend his body," (Act 1, Scene 2). This scene describes Cassius, bowing down to Caesar as a king even though he saved his life.
Most of the illustrations of betrayal in this story are fairly upfront, until Act 3, after Caesar has been killed. His friend Mark Anthony acts as though he is betraying Caesar in order to take his revenge later. When he first arrives at the murder scene, he shakes hands with all of the conspirators that have killed Caesar, even though their hands are covered with blood. He then