Ermak 4 Igor Valeriev Novel Adventure, Hit in time, Alternative History 1of2

This book continues to tell about the adventures of a special forces officer with the call sign "Ermak". Having died in the XXI century, he woke up in one thousand eight hundred and eighty-eight in the body of a fourteen-year-old orphan Timokha Alenin, the future Cossack of the Amur army. He knows how to fight and is ready to defend his homeland, regardless of what it is called.
Sacrificing himself, a young Cossack saves the life of Tsarevich Nikolai Romanov. His courage was appreciated by the emperor, and the fate of the popadanets began to change dramatically. From a simple boy, he grew into an officer of the General Staff, a cavalier of St. George and a hereditary nobleman.
Now he faces a new task - to prove the effectiveness of the tactics of using small reconnaissance and sabotage groups armed with automatic weapons in the enemy's rear. And the Russian-Chinese campaign provides excellent opportunities for this.