For the first time since 1957, Louth will contest an All Ireland Football semi-final.
The wee county have beaten Monaghan 27 points to 2-18.
They had to battle hard for most of the game, after Oisin McGorman was dismissed for a shoulder charge after just 7 minutes.
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Sam Mulroy chipped in with 5 points, while Ryan Burns and James Maguire both got 4.
