This Day in History: 1403-08-15

On 15th August 1403, Henry IV, having accepted the Earl of Northumberland’s submission at York, made him seal documents at Pontefract commanding his officers to surrender all his castles and all the knights and esquires in Northumberland county to swear an oath of loyalty to Henry. On this day, Henry also commanded his sheriffs to raise forces to meet him at Worcester on the 3rd September for a fourth Welsh campaign in order to quell Owen Glendower’s rebellion.