Moltke's victory at Koniggratz brought a swift end to the war, ended by the treaty of Prague.  
It began when a modernized army reorganized by Albrecht Theodor, Count Von Roon and Moltke attacked Austrian  forces in Bohemia. Moltke's victory at Koniggratz brought a swift end to the war, ended by the treaty of Prague.  Instigated by Bismarck, this was, FTP, what brief conflict that stemmed from the contested territories of Schleswig and  Holstein, fought between Austrian and Prussia.
It began when a modernized army reorganized by Albrecht Theodor, Count Von Roon and Moltke attacked Austrian  forces in Bohemia.
{Seven Weeks' War} [or {Austro}-{Prussian War} before Austria is mentioned]