Slitherine

I registered on Streitmacht to download Legacy of Versailles, but someone has sent me a message in German:

Kennst Du schon unsere Streitmacht ?

Can someone who knows German give me a translation?

Thanks!

PS: can someone give me an appropriate reply? Like for instance, I downloaded Legacy of Versailles for Panzer Corps is probably what I want to say? Or should I reply in English?

"Do you already know our Streitmacht ?"

Streitmacht apparently is the name of the site and means something like combat force. Actually, it sounds like an automated welcoming message of a forum which does not require a reply.

This is a role playing game from this side, to play, it is unnecessary.