According to the official website, an original TV anime series, entitled 「Girls und Panzer」, has been green-lit for production. The story revolves a school military with Mizushima Tsutomu (Shinryaku! Ika Musume) serving as director.

*Anime PV:

In addition, author Saitaniya Ryouichi will produce a tie-in manga series to promote the upcoming project — to be serialized in Comic Flapper magazine in June.

[Source]