Overview
- Russian forces launched very large waves of airstrikes and attack drones that Ukrainian military tallies say involved thousands of kamikaze drones and hundreds of guided bombs between 18 and 20 September.
- Ukrainian commanders reported heavy frontline fighting with hundreds of daily engagements and local gains from Operation Vivaldi that cut a Russian salient north of Sloviansk and liberated villages in Donetsk.
- Overnight on 20 September Ukraine confirmed long‑range strikes that damaged the Gazpromneft refinery in Kapotnya near Moscow while Russian authorities said a record drone attack struck the capital region.
- Regional officials across Kyiv, Kharkiv, Donetsk, Sumy and Zaporizhzhia reported civilian deaths, multiple injuries and widespread infrastructure damage as air defences were repeatedly taxed.
- Ukrainian ministers and aid groups warned that Russian forces are blocking food, medicine and evacuations in occupied Oleshky, creating a critical humanitarian crisis and complicating relief efforts.