About the book: year / Former special forces officer Andrei Rusakov, who by the will of fate found himself in the 17th century, at the court of Prince Jeremiah Vishnevetsky, and appointed his first adviser, took up the implementation planned plan. Breaking away from the persecution of the Cossacks by Hetman Khmelnytsky, Andrei finally began the production of new types of military equipment for this era and began training personnel. Meanwhile, the flames of the war started by Khmelnitsky are flaring up. The Polish Sejm sends a large army to suppress the uprising; in Moscow they are intensely thinking about how best to deal with Khmelnitsky - to support or refuse help, so as not to spoil relations with the Polish-Lithuanian Commonwealth. Andrey has a lot of worries of his own, and then his beloved woman presented an unexpected surprise…