The full-scale fighting that began in February 2022 had several stages. One of the most difficult was the summer of 2022, when the Armed Forces of Ukraine held back enemy strike groups in the South and North-East. The territories where direct clashes took place were actively mined, as a result of which the places of hostilities were saturated with hundreds of thousands of anti-personnel and anti-tank mines. Besides them, aircraft bombs, mortar shells and ammunition that did not get stuck and did not explode remain in the ground. Demining, engineering intelligence and installation of mine-explosive barriers are engaged in combat engineer units of the Armed Forces of Ukraine. Most Ukrainian sappers are universal specialists who are able to perform a wide range of tasks. Their work is needed everywhere, they work in different areas of hostilities and provide engineering support for many units. Sappers perform assigned tasks not only in the second echelon of defence, but also on the line of direct clashes, in front of combat positions. Also to find explosive objects sappers help dogs.