A treasonous group who secretly undermine a nation from within.
The term was coined by the Nationalist General Emilio Mola Vidal during the Spanish Civil War (1936-39). As four of his army columns moved on Madrid, he referred to his militant supporters within the capital as a “fifth column,” who weakened the loyalist government with a campaign of sabotage and uprisings.
The term comes from Shakespeare’s The Tempest when a storm causes Trinculo to seek shelter under a sheet with Caliban, whom he regards as an enemy. “There is no other shelter hereabout: misery acquaints a man with strange bedfellows. I will here shroud till the dregs of the storm be past.”
