WW I: Austria-Hungary sends troops to the Serbian frontier 20 Sunday Jul 2014 Posted by Will Kirkland in Europe, History, War ≈ Comments Off on WW I: Austria-Hungary sends troops to the Serbian frontier TagsWar, WW I, WW I Timeline July 20, 1914 Austria-Hungary sends troops to the Serbian frontier Share this:EmailFacebookPrintTwitterMorePinterestWhatsAppLike this:Like Loading...