After the crushing defeat at the Battle of Lothar, Napoleon III realized that the invincible French army had encountered a strong enemy and that the enemy was outnumbered, so he asked Empress Eugenie, who was in Paris, to send reinforcements.

But Empress Eugenie had no idea how to fight at all, although she insisted on sending troops to attack Prussia, but she was completely encouraged by the Dajin capitalists around her, especially the opinion of the Minister of War, Duke Persini, in order to save military expenses, she refused to send reinforcements, thinking that the combination of the Charon Army and the Emperor's Guards would definitely defeat the enemy, she not only refused to send reinforcements, but also urged the French army in front to converge as soon as possible, and then attack from the northwest, Occupy the eastern bank of the Rhine and Frankfurt in the Kingdom of Prussia, where industry and agriculture were developed.

At this moment, the commander of the Charon Army, Patrice McMahon, realized that the Kingdom of Prussia was much better prepared than the French army, coupled with the crushing defeat of the Matz Army, the Rhine Combined Army had been broken, and the situation was very unfavorable to France, so he decided to continue to retreat to the area of Charlon, and wait for Paris to send reinforcements and be fully prepared before attacking Prussia.

After all, the positions on the front border are set up for offensive purposes and are not suitable for defense at all, and in such a situation, one's own side should retreat to the depth of the theater of operations in the rear, replenish the troops and adjust the deployment, and then wait for a decisive battle with the enemy. Even, the strategic location has been chosen, which is the area of Chalon, not far from Paris.

Unfortunately, as the chief of the general staff of the French army, Edmund Leboeuf belonged to the faction of the empress, and he strongly recommended to the emperor Napoleon III that the decision of Paris should be carried out, and that the army should not be allowed to continue to retreat, otherwise Paris would be endangered, but should turn around and avoid the main Prussian forces to break through the border between the two countries from the northwest and attack the Prussian hinterland across the Rhine.

The Emperor, who was in command at the front, was relatively calm at the moment, although he was also worried about the safety of Paris, and at the same time, for the sake of his own face, he did not approve of retreating, but because of the defeat of the Matz Corps, it was not advisable to continue the attack, so he ordered the French troops on the front line to concentrate in the area of Luxembourg and prepare to hold on accordingly.

The war came to a temporary standstill, and the Prussian side was not able to fully develop its attack, unable to attack continuously, unable to pursue the victory. After all, in the eyes of Ron, the direct commander of the Prussian army, the Minister of War, the main force of the French army did not suffer major losses, and with the presence of Emperor Napoleon III, the morale of the French army was not low, and the French army's invincible overseas record made Ron dare not mention the underestimation of the enemy, this war was related to the national fortunes of the Kingdom of Prussia, and he did not dare to advance, but just advanced step by step.

And at this moment, three pieces of news came at the same time that made the Prussian front army desperate.

First, Tsarist Russia received international solidarity from Britain, France, and other countries, and its confidence was greatly increased, and it recruited soldiers around Moscow, and also promised that the land in Kiev, the Crimean Peninsula, the Volga River Valley, and the Caucasus could be permanently distributed to soldiers who had joined the army and had military merits. And the Moscow tsarist authorities also made a bloody investment, although the government was on the verge of bankruptcy, but these nobles also realized that they would really lose their country without a little blood, and donated some funds for the production and purchase of weapons to equip the army that joined the army. In a short period of time, an army of 150,000 was formed, together with the 210,000 army that was originally in Moscow, except for the 80,000 troops who continued to defend Moscow and other places, the remaining 280,000 troops went west along the waterway of the Volga-Baltic Canal to the northwest, preparing to meet the approaching Prussian army of 150,000 troops, 30,000 Finnish troops and 50,000 Polish-Lithuanian troops.

In addition, the young Tsar Alexandrovich was deeply aware of the political genes of the Romanov dynasty, and sent envoys in advance to negotiate with the leaders of the rebels in Finland and Poland, proposing that Tsarist Russia was willing to recognize and help the two independent statehood, and sign a treaty permanently, at a very relaxed price, and the armies of the two countries would no longer be enemies of Tsarist Russia and withdraw to their own places. Of course, if he was willing to help Tsarist Russia, the Tsar was willing to make appropriate concessions when agreeing on the border between the two countries.

After learning that Britain and France had sent troops to help Tsarist Russia deal with the Kingdom of Prussia, these rebel leaders had other ideas.

Soon, on the Eastern European Plain centered on a riverside town called Borovich, 150,000 Prussian troops fought a decisive battle with the 280,000 troops temporarily formed by Tsarist Russia on a front stretching for more than 30 kilometers.

But one night, when the Tsarist Russian army suddenly launched a night attack, 30,000 Finnish troops in the north and 20,000 Lithuanian troops on the south bank of the Volga River suddenly rebelled, turned against Tsarist Russia, and launched an attack on the rear of the Prussian army. Although the Prussian army camp was a little distant from these rebels, it was originally a friendly army after all, and when it was too late, the Tsarist army, led by desperate aristocratic officers, together with the Finnish and Lithuanian armies, defeated Prussia.

Even the Polish army, which had not yet defected, fought against the Prussian army in the dark of night, and both sides suffered heavy losses. The Prussian army retreated overnight, the Tsarist and Finnish armies hurriedly pursued, and the Prussian army of 150,000 attacking Tsarist Russia was defeated and retreated in embarrassment. Fortunately, the Polish army still claimed to remain neutral, withdrew from the war between Prussia and Tsarist Russia, and did not attack Prussia back. But even so, the Prussian army was left with less than 110,000 men, and the logistics and some artillery were captured by the Russian army and became lacking and in trouble.

Second, the British directly declared war on Prussia because the Kingdom of Prussia not only sent military commanders to help the Eastern Army train soldiers, but also provided military weapons, technology, and intelligence on the pretext that they suffered crushing defeats in the course of their two expeditions to China.

The British Navy sent a powerful fleet to capture the Faroe Islands, and then helped the Danish army capture the ports of Frederiksport and Kiel on the Jutland Peninsula, using the firepower of superior warships to defeat the Prussian army in the main ports on Jutland, and assisted the Danish army to land and prepare to occupy the entire Jutland Peninsula.

Not only that, the British Navy also took advantage of the fleet's maritime superiority to attack Prussia's newly built naval base in Bremerhaven and Hamburg, Danzig Port, and Königsberg, sinking and capturing all the naval bases that Prussia had not easily built and some warships that had been accumulated, and only the Prussian Royal Fleet, which assisted 150,000 troops in attacking St. Petersburg, remained in the port of St. Petersburg and escaped. The purpose of the British navy was obvious, it was to control the entire Baltic Sea, attack St. Petersburg, which was occupied by the Prussian army, and help Tsarist Russia recover the capital of St. Petersburg.

An army of 8,000 men from the American Commonwealth also arrived in Greenland and quickly occupied the southern garrison, while attacking the 3,000 Prussian troops stationed in Iceland.

The third was the most fatal blow, the Austrian Empire completely turned its back on the Austro-Prussian alliance.

Originally, Austria only announced that it would withdraw from the attack on Tsarist Russia and remain neutral. The Emperor and Prime Minister Bismarck hurriedly sent a secret envoy to Vienna to ask for a meeting with the Emperor, asking Austria to continue to maintain an alliance with Prussia, after all, they are all Germans, but the Austrian Emperor did not see the Prussian envoy at all, and also revealed the whereabouts of the envoy, and spies from Tsarist Russia and France soon arrived and assassinated the Prussian envoy.