The war began when Prussia attacked Saxony. 1756 On August 28th, the army of Prussian King Friedrich II (95,000 men) suddenly invaded Saxony, surrounded the Saxon army (18,000 men) and forced it to surrender on 15 10/6. In the 1757 war, Friedrich II took advantage of the inconsistency of the Franco-Austrian-Russian alliance plan (France started to fight in the spring, while Russia started to act in the summer) and the weakness of the army (more than 300,000 people) to go to war with Austria first. Pu Jun (654.38+0.92 million) launched a centripetal attack on Prague from four sides. However, Austrian Marshal Dawn's troops (more than 50,000 people) who came to reinforce defeated Pu Jun near Colin on June 18, 2008, forcing Pu Jun to give up the Czech Republic. In April, Marshal estelle's French army (70,000 people) occupied Hesse-Kassel and Hanover. Prince Sobitz's French army (57,000 men) arrived in Eisenach in August and bullied Prussia. Friedrich II deployed the main force to meet the French army and defeated the French army in the Battle of Rosbach (1 1757) on 10. Subsequently, he sent troops (40,000 men) into Silesia. Pu Jun (30,000 men) of Marshal L? vald took action against Russian troops (70,000 men) who attacked East Prussia. On July 5th, some Russian troops (24,000 men), under the command of Marshal Aplak Sin and with the support of Baltic Fleet, opened the road to East Prussia. But Aprasin thought that Peter III, a follower of Friedrich II, would soon become the Russian emperor (Queen Elizabeth Petrovna was ill), so he ordered the troops to withdraw from Memmel. To this end, he was sent to court by the emperor for trial, and his position was replaced by General Fulmore. Swiss troops (23,000 men) launched an attack on Stedding (Szczecin) in Pomerania in September, but after the Russian troops withdrew from Memmel, they also withdrew to Larcon. In this way, Pu Jun won the war of 1757.