What factors helped Bismarck to achieve success pre-1870?

The Prussian army:

• German unification was the immediate result of three short wars against Denmark, Austria and France
• It improved due to Roon and Moltke 
• Roon ensured forces were increased, better trained and well armed
• Moltke used railways and the telegraph for better communication and transportation

Prussian economic success:

• Produced more coal and steel than France or Austria
• Education, C-I-C
• Krupps proudced high quality armaments

Economic unity and the Zollverein:

• 1864…