Think of Wales' biggest results in history and 3-1 versus Belgium in Lille, then 2-1 against Italy at the Millennium Stadium are the ones that immediately spring to mind.
The World Cup Class of 2022 are going to need to usurp each of those and produce the greatest win in Wales' 146-year history if the dream we've so cherished for six decades isn't to just fizzle out almost before we've had a chance to really enjoy it properly.
Wales v England on Tuesday night is simply must-win for Gareth Bale and his team. No ifs, buts, or maybes. Three points or bust. And even then the result of the other game, USA against Iran, has to fall in Wales' favour.
