What did austria hungary do after the assassination?

Karl Von Berchtold, had earlier stated that 'Serbia must be eliminated as a power in the Balkans'. Both Von Berchtold and Von Hötzendorf had favoured an immediate surprise attack against Serbia. However, the Hungarian Chancellor, Count Tisza, was unsure and urged the Austrians to seek German support, prior to any declaration of war against Serbia

It can provide a social code to protect each citizen's future economical earnings. and then obviously defending the country from invading countries.