The phrase comes from Twierdza, the Polish release of the medieval strategy game Stronghold, where advisors announce shortages that block construction and weapons production. Iron is needed for armour and weapons, so hearing the warning often meant an army plan had to wait. Polish players shared the line outside the game as a soundboard clip, turning a routine management alert into shorthand for any shortage. Its appeal survives because the wording is instantly clear to Polish speakers and the stern delivery suits gaming edits and everyday fails.