what types of advantages did steel give to the spanish
Conquistador Conquistadors had overwhelming military advantages over the native peoples. They belonged to a more militarily advanced civilization with better techniques, tools, firearms, artillery, iron, steel and domesticated animals. Horses and mules carried them, pigs fed them and dogs fought for them. The indigenous peoples had the advantage of established settlements, determination to remain independent and large numerical superiority. European diseases and divide and conquer tactics contributed to the defeat of the native populations.
History of the steel industry (1850–1970) In 1869 iron was already a major industry, accounting for 6.6% of manufacturing employment and 7.8% of manufacturing output. By then the central figure was Andrew Carnegie,[35] who made Pittsburgh the center of the industry.[36] He sold his operations to US Steel in 1901, which became the world's largest steel corporation for decades.