Formulate an answer to this elaborate question: Targe (from Old Franconian *"targa " "shield", Proto-Germanic *"targo " "border") was a general word for shield in late Old English, its diminutive, "target", came to mean an object to be aimed at in the 18th century, Frankish, Old Franconian or Old Frankish was the West Germanic language spoken by the Franks between which type span?
4th and 8th century