‘’Historical evidence suggests that the hoplite armor (chest corslet, helmet, and greaves) developed at about the same time (circa 650 B.C.)’’
Please forgive me but I don’t understand this one..Bronze armor goes back to Mycenean era.Corinthian helmet and bell curiass however were developed somewhere in the Dark Ages, or after, let’s say 700 BC.
I didn’t mean to suggest at the various components of the Spartan armor were developed simultaneously but that they came together as a set of armor in about 650 B.C. I count the porpax shield as a new development because we know that the Assyrians were using single handled shields a century before. The porpax shield probably contributed to the development of the phalanx as a tactic.