What defense system was created within the borders of the Russian kingdom?
To protect the country from attacks on the southern and eastern borders, they developed a complete system consisting of natural barriers. But what was his name and what role did he play in the defense of the country?
You will find the answer to the historical question in the new episode of the program Quiztoria. Teams from Urukhovo-Zev Vigorievsk will compete in it.
Watch the full episode here.