Tire Sidewall problems of the 1997 Mazda B4000

While driving at 70mph in right lane on rural highway, I heard a thud and immediately lost control of the truck and was thrown into the left lane almost over the center line. I regained control of the truck and stopped on the side of the road. The tread on the driver back tire was completely peeled off, but the tire had not deflated. The back truck fender and fender guard was completely bent underneath the truck. The fender and guard in front of the tire was bent outward, with the support frame broken and the fender gueard sticking at a 90 degree angle out from the truck. When I took the tire off the truck, the entire tread was wrapped 3 times around the axle. Both back tires and the spare are the same firestones. On inspection of the other back tire, we have found cracks in the sidewall both near the center, as well as cracks near the tread along most of the tire. (dot number: hyfc80a239 tiresize: p225/70r14).