We must rely on the developed railway network. At the beginning of the war, the Prussian army used the developed railway network to quickly assemble 250,000 soldiers and more than 800 artillery pieces to the Puao border. The new means of communication, telegraph, solved the coordination problem caused by long-distance maneuvering. The Puao War was divided into three fronts. Through rapid and long-range maneuvers, Prussia completely defeated the Austrian army in only six weeks. At the cost of 37,000 casualties, the number of Austrian soldiers has more than doubled. Finally Austria had to compromise with Prussia. Of course, in the course of the war, due to the imperfection of the telegraph network, although the general army won a great victory in the battle of Sadova, it failed to destroy the1.5000 Austrian army. After the war, Mao Qi absorbed its own experience and accelerated the improvement of telegraph network organization and command system. It's a pity that Austria didn't have a clear strategic direction from beginning to end. It was attacked on all sides and was finally kicked out of the German Empire in World War I..

In fact, the failure of France in the Franco-Prussian War is inseparable from its own internal reasons. As early as the French Revolution, France hoped to establish a republic, change the state system and abolish the feudal monarchy. However, after Napoleon usurped power, he actively expanded overseas, diverted domestic attention and tried to maintain the domestic social system. However, after the middle of19th century, the wave of the French Revolution became higher and higher. In addition to the Paris Commune, large-scale revolutionary movements broke out in many parts of France, which kept the French government busy. Apart from domestic reactionary forces, France lost the Franco-Prussian War for the same reason as Denmark and Austria, that is, it underestimated Prussia's combat capability.

During the rule of the Second Empire of France, due to the oppression of the tax system and the exploitation of businessmen and usurers, French farmers fell into poverty and bankruptcy. As for small producers, businessmen and employees in cities, most of them lost their homes under the oppression of capitalist foreign exchange speculation and heavy taxes. In this case, Charles Louis Napolé on Bonaparte not only failed to improve the situation, but also was extremely extravagant. He built himself a luxurious palace, granting officials, knights and bribes at will. This is also one of the reasons for the failure of the Franco-Prussian War.