When did Bayern Munich win their first competitive game under Barcelona's former manager?
Louis van Gaal Aloysius Paulus Maria "Louis" van Gaal, (] ; born 8 August 1951) is a Dutch football manager and former player. He was formerly manager of Ajax, Barcelona, AZ, Bayern Munich, the Netherlands and Manchester United. He is one of the most decorated managers in world football, having won 20 major honours in his managerial career.
2012–13 Bundesliga The 2012–13 Bundesliga was the 50th season of the Bundesliga, Germany's premier football league. The season began on 24 August 2012 with the season opening match at Westfalenstadion involving defending champions Borussia Dortmund and SV Werder Bremen and ended with the last games on 18 May 2013, with a winter break between the weekends around 15 December 2012 and 19 January 2013. Bayern Munich managed to secure the championship of the 2012–13 season after only 28 match days, beating their previous record by two matches.