Kyiv Oblast Military Administration reported on the morning of 20 September that air defence has been responding to a Russian drone. Source: Ukraine's Air Force; Kyiv Oblast Military Administration Details: At 08:59,

Moscow has moved about 40,000 Russian soldiers to embattled Kursk Oblast, President Volodymyr Zelensky said in his evening address on Sept. 19. Ukraine launched its cross-border incursion into Russia's Kursk Oblast in early August,

Analysts at the Institute for the Study of War (ISW) have noted that the Ukrainian military was able to take advantage of the situation to launch an offensive in Russia’s Kursk Oblast, despite the fact that Russia knew about this and prepared for the Ukrainian operation for months.