He was outnumbered- his army was around 326,000 strong whilst his 2 enemies had 270,000 (Austrians) and 120,000 (North-German state). He used his principle of heavy use of defensive firepower, leaving only 48,000 to defend against the N-G states. The remainder went against the Austrians and using 5 railway lines to coordinate movement of his forces he defeated them by frontal attack with one army, whilst the second attacked from the side. His 48,000 defeated the Northern German army and captured Hanover.