His heroic efforts to provide cover for fellow soldiers as they escaped from the canyon led to his tragic death via fratricide .
On April 22 , 2004 , Tillman 's unit was ambushed as it traveled through the rugged , canyon terrain of Eastern Afghanistan .
Tillman 's heroic efforts to provide cover for fellow soldiers as they escaped from the canyon led to his tragic death via fratricide .
On April 22 , 2004 , Tillman 's unit was ambushed as it traveled through the rugged , canyon terrain of Eastern Afghanistan .