Following the advance of Russian troops into the Ukrainian border region of Kharkiv, Ukrainian Commander-in-Chief Oleksandr Syrskyi has described the situation there as “difficult.” “This week, the situation in the Kharkiv region has significantly worsened,” Syrskyi wrote on Telegram on Sunday. “There are ongoing battles in the border areas along the state border with the Russian Federation.” While admitting that the situation is “difficult” and that Russian attackers had achieved “partial successes” in some areas, he said, “Ukrainian defence forces are doing everything they can to hold defens…