Few countries allow the existence of "B Teams" within their professional soccer pyramid, even fewer allow them to participate in the cup, and of those few even fewer are able to progress significantly. In 1993 Hertha Berlin's B team, known at the time as Hertha Berlin Amateure, shocked Germany.
As the name suggests, B Teams are really only meant to develop and test young players in a competitive scenario. However in Germany these reserve teams are allowed to participate in the national cup which opens up the possibility of a Cinderella story.
The journey began in the round of 64 defeating Heidelberg 3-0, in the following round Hertha B overcame Lokomotiv Leipzig 4-2, and in the round of 16 they got passed Hannover 4-3. At this point eyes were already turning towards what was happening in Berlin, after all Hertha Berlin had just lost to Leverkusen. This means that not only was Hertha Berlin Amateure eliminating teams in higher divisions and with more experienced players, but they had also made it further than their clubs main team.
Now it was the B team hosting the games in the city's Olympic Stadium, and the fans were selling it out. They continued to advance defeating Nurnberg and Chemnitzer in the quarter-finals and semi-finals respectively.
The final was once again in a packed Olympic Stadium in Berlin against Bayer Leverkusen, same club who had eliminated Hertha's "A Team". Again the black and reds came out on top with a solitary goal at the 77th minute. Regardless of the final result history had been made. Hertha Berlin Amateur had become the first 3rd division team to reach the final, the first and only B team to reach the final, and had humiliated their "A Team".
This feat will never be achieved again because within the next 8 German Cup editions Bayern Munich, Kaiserslautern and Stuttgart all actually played against their reserve teams. Even though none of the reserve teams won the federation decided in 2001 to implement rules restricting first and reserve teams to play against each other unless they both reached the final, and then in 2008 they banned the B teams from participating at all.
Even though on one hand we'll never be able to see a reserve team make an unbelievable cup run like that again, on the other hand it makes Hertha Berlin Amateure's story one that will be remembered forever.