About the book: 2015 / GRU special forces fight not only around the world, but at all times. The special forces are ready to take battle not only behind enemy lines, but also in the distant past, be it the Time of Troubles or the era of Peter the Great. A MILITARY SPECIALIST from the future challenges history by leading special operations against the Crimean Tatars in the Wild Field, the Turkish Janissaries near Azov and the Swedish invaders near Poltava.