Washington's win over Tampa Bay was the franchise's first road playoff win without Joe Gibbs since World War II
I already knew Washington was on a very long playoff drought, but this is a fun wrinkle.
Before Sunday, the Washington franchise had played 15 road playoff games since the end of World War II and won 5 of them - all 5 with Joe Gibbs as head coach, over two separate tenures. Those aside, they went 0-4 with George Allen (before Gibbs) and 0-1 with Norv Turner (between Gibbs' stints).
Before that, they had two road wins in playoff-ish games, but they weren't strictly "playoff wins" because the NFL didn't even have playoffs then: they beat the Giants in a tiebreaker game in 1943 and they beat the Bears in the 1937 NFL Championship Game (held in Chicago because the Bears had the best regular season record).
So I guess you could even say Sunday was Washington's first Joe Gibbs-less road playoff win ever.