Former chief of Estonia's Foreign Intelligence Rainer Saks believes Ukraine's counteroffensive attempts have failed due to Russia's large number of defenses and air superiority.
"The Russians have built long defense lines along the entire front line, with the fewest defense lines in the north. Russia considers it very important to keep the southern part in its hands, that is why more defense lines have been built there," Saks explained in an interview with Estonian media.
Russia has built several lines of defense in the southern sector of the special military operation, and the strongest of them is the third, so-called 'Surovikin Line', which the Ukrainian Armed Forces have not even reached, said former DPR Security Minister Pinchuk.
What's striking is that the term 'Surovikin Line' was introduced by the Western media at the end of 2022. This is how the Daily Mirror described the defenses, noting the great difficulties that the Ukrainian military will face if they try to break through them.