America's first firearm used by explorers found in Arizona
The discovery of a bronze cannon linked to the Coronado expedition reveals America's first firearm, predating previous findings by about 300 years.
Crossbow bolts and coins: The archaeological trail of the Coronado expedition that discovered the Grand Canyon
Coronado's expedition did not find the Seven Cities of Cibola but left valuable archaeological evidence of 16th-century Spanish exploration in the U.S.