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The Khartiia unit – Ukraine's 2nd Corps of the National Guard – and other Ukrainian units are building a deeply layered defensive line on the Kharkiv front on the orders of the commander-in-chief of the Armed Forces of Ukraine.

Source: 2nd Corps of the National Guard of Ukraine

Details: The Ukrainian military is constructing extensive trench and dugout systems, anti-tank ditches, engineering obstacles, bunkers and other fortifications.

Quote: "The defensive line in question consists of an outer ring, three anti-tank ditches with a total length of 135,000 m, a ring of tetrahedrons, 135,000 m of barbed wire and 90,000 m of low-visibility obstacles. The next stage of construction is the inner ring."