How does Cassius die?

Cassius kills himself with the same sword that killed Caesar because he believes his friend Titinius has been captured by enemy troops. Cassius sends Titinius to ride to a distant camp and determine whether the camp belongs to friends or enemies. Pindarus, Cassius’s servant, reports that a group of men on horseback surround Titinius and take him captive. Aggrieved and ashamed that he should “live so long / To see my best friend ta’en before my face,” Cassius decides he too must die. However, Cassius doesn’t take his own life, technically avoiding suicide as he instructs Pindarus to “guide” the sword. The audience learns immediately after Cassius dies that Titinius was never captured and is alive among friends. Cassius thus kills himself for no good reason. Although he appeared politically savvy and cunning throughout the play, Cassius proves in the final act he is not as shrewd as the audience is led to believe.