The word “slogan” comes from the Gaelic words “sluagh” and “ghairm,” meaning “battle” and “cry.”  A sluagh-ghairm was a battle cry used by Scottish or Irish clans.  Using a slogan in today’s sense as a battle cry is way less intimidating.  A bunch of warriors running down a hill yelling “There are some things money can’t buy. For everything else, there’s Master Card!!!!!!!!!!!!!!!!!!!” is not very terrifying.