Meanwhile , Henri II of France was accidentally killed in a jousting tournament and Mary 's husband became King of France on 10 July 1559 .
Arran changed sides at this point , joining the Lords of the Congregation .
Henri II of France was accidentally killed in a jousting tournament and Mary 's husband became King of France on 10 July 1559 .
Arran changed sides at this point , joining the Lords of the Congregation .