The book "My Experiences on Nan Shan and Port Arthur with the Fifth East Siberian Regiment" by Mykola Oleksandrovich Tretyakov is a fascinating narrative about the events of the Russo-Japanese War. The author, who took part in the battles, describes in detail the fighting, strategy and tactics of the defense of Nan Shan and Port Arthur. The reader gets the opportunity to see the war through the eyes of a participant, to feel the tension of battles and the despair of the winners and losers. This book not only reveals an important stage in the history of East Asia, but also helps to better understand the inner world of the warrior, his thoughts and experiences.