With this peace treaty being annulled, the Fox declared war to the French and all their Indian allies. For the next four years, the French invested a lot of money and, with their allies, descended on Fox villages with an extreme advantage. The French pursued destruction of the Fox to such an extent as to damage their relations with other tribes. The Sioux and the Iowa refused to grant the Fox sanctuary. By the summer of 1730, the Fox population was weakening and continued to be attacked until the Sauk finally granted them sanctuary. The Sauk and Fox fought off the French with the help of western Indians, who were aware of Beauharnois' plan for decimation. This final push would cause Beauharnois to grant a "General Pardon" in 1738 and for peace to be restored.