It was announced at the 2nd Heartful Tank Carnival event today and on its official Twitter account that a sequel anime for the Girls und Panzer franchise titled Girls und Panzer: Saishuushou (Girls und Panzer: The Final Chapter) is in production. The format for the anime is unknown at the moment. The announcement PV, which is currently not available online yet, also revealed some new characters. The BD and DVD sets for the 2nd Heartful Tank Carnival event will go on sale next year on February 24.
The first season ran for 12 episodes from October 2012 to March 2013. It has since been adapted into other various mediums including manga spin-offs, OVAs, and a movie.