AFGHANISTAN, May 20 - Russian forces are focusing on digging in and reinforcing defensive positions in Kharkiv and along the Southern Axis in preparation for Ukrainian counteroffensives, while the majority of active offensive operations remain confined to Izyum-Donetsk City arc and especially the Popasna-Severodonetsk area. The Ukrainian General Staff reported that Russian forces are creating secondary defensive lines on the Southern Axis, indicating that the Russian grouping in this area may be preparing for a major Ukrainian counter-offensive and a protracted conflict.