The year is 1237. Rus' gushing with blood before the invasion of the Horde... and our entrapment in the body of a dying Smolensk prince. There are four years left before the invasion of the Tatar-Mongol horde into Rus', torn apart by princely feuds, in which the prince’s father, Prince Smolensky, is actively participating. Will the prince have time to prepare his armored infantry and equip his army with new weapons, since he is very familiar with the processes of casting iron and steel, and chemistry is generally his strong point?