Jägerbataillon Vienna 1 Hoch- und Deutschmeister (High and German Masters). Their objectives in case of conflict is to defend Government buildings in Vienna. They also have strong partnership with the Guards of Austria. Most if not all the Soldiers part of Vienna 1 is actually from Vienna.
That is very small but considering the size of the country itself it seems reasonable. But in case of war it needs to be sheltered otherwise it will get swallowed easily.