I shout, taking on olden days (4,3)
I believe the answer is:
iron age
But I can't explain it at all! Could you help me understand?
(Other definitions for iron age that I've seen before include "Time of the spread of metal weapons, tools etc" , "Period when metal tools were developed" , "Prehistoric period" , "Period in the history of man - a region (anag)" , "historical period" .)