Question

A kingdom for a stage, princes to act
And monarchs to behold the swelling scene!
Then should the warlike Harry, like himself,
Assume the port of Mars; and at his heels,
Leash'd in like hounds, should famine, sword and fire
Crouch for employment.

This excerpt mostly introduces

the character of King Henry, or Harry.
the setting of the port of Mars.
the conflict of a war between England and France.
the setting of the fields of war.