On the one hand, Gertrude still plays the role of the faithful queen, telling Claudius of Polonius' murder. She does not object to Hamlet's being sent to England, and she does not abide by Hamlet's request to stay away from the king
On the other hand, she does not report all of the details of her conversation with Hamlet, says he's weeping with remorse, and there is no evidence to suggest that she knows the fate that awaits her son in England.
The answers that apply to the question would be: John Brown's raid AND the election of 1860. The other events had already happened by the time the civil wat started.
