Symbols have distinguished friend from foe in warfare throughout recorded history. Organizations of the United States Air Force, like other military organizations, employ heraldic emblems as a means ...

Carved coat of arms with the signature “Altbach”. This image is almost identical to the coat of arms of the modern town of the same name in southern Germany. It appears to be an unknown pilgrim from ...

In the Middle Ages, knights-whose view of the battlefield was limited to what they could see through tiny slits in metal helms-recognized the need to be able to better identify friend from foe. Rather ...