Ukrainian border guards and engineers in the Chernihiv region have been building a defense line along the border, designed to meet any possible “surprise” from Belarus, turning forests and marshes into a layered barrier of wire, ditches, and anti-tank concrete.Ukrinform spoke directly with the border post commander Yevhen, callsign “Nissan,” from the State Border Guard Service of Ukraine, in an on-site interview near the Ukrainian-Belarusian border in the Chernihiv region.JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official.“Engineering barriers consist of a complex of artificial and natural obstacles,” Nissan explained. “Artificial ones are low-visibility wire obstacles and ‘Egoza’ [registered trademark for a highly durable type of reinforced razor wire]. Natural ones are forest blockages,” he added.“We use nature as an ally,” Nissan said. “A tree can be cut so that it falls at a certain angle and stays half-sawn. It simultaneously stands, overhangs, and seriously complicates movement for vehicles and infantry.”Dragon’s teeth anti-tank barriers“Dragon’s teeth” are concrete barriers that weigh around 1.5 tons, and are about 10 meters (33 feet) wide, designed to block likely routes for armored vehicles. In the Chernihiv region, they have been placed alongside the forest edge. Behind them, Ukrinform reports, lie deep anti-tank ditches with steep vertical walls – the result of weeks of excavator work in heavy, waterlogged soil.