Valdez halted the siege in April 1574 to face the invading rebel troops .
Sancho d'Avila reached rebel troops first and defeated the army of Orange in the Battle of Mookerheyde , where Louis fell .
Valdez halted the siege in April 1574 to face the invading rebel troops , but Sancho d'Avila reached them first and defeated the army of Orange in the Battle of Mookerheyde , where Louis fell .