You must be playing as the Franks, and must be in the Imperial
age. Click on the castle and there should be a button that upgrades
throwing axemen to elite throwing axemen.
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I think you need to get the research level 3 for it
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Research axemen in Smithy.
Recruit in Barracks.
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The University of Maine Black Bears. The name of the mascot that
shows up at the games is Bananas the black bear.