But the revolution in warfare was immediate.

The wars of Henry the Fifth were wars of sieges.

The "Last of the Barons," as Warwick has picturesquely been styled, relied mainly on his train of artillery.

It was artillery that turned the day at Barnet and Tewkesbury, and that gave Henry the Seventh his victory over the formidable dangers which assailed him.

The strength which the change gave to the Crown was in fact almost irresistible.