Monthly report from UCDP event data for Sumy oblast, Ukraine. Country-wide report: Ukraine, September 2025.
65events52 the month before
120est. deathsrange 118–132
11civilian deaths
In September 2025, UCDP recorded 65 organized-violence events in Sumy oblast, Ukraine, with 120 estimated deaths. That is +25% compared with 52 events the month before. The death toll range is 118 to 132.
100% of the month's events were state-based armed conflict. Civilian deaths: 11.
The most active pairing was Government of Russia (Soviet Union) - Government of Ukraine with 65 events.
Where events happened
Recorded organized-violence events in Sumy oblast, September 2025. Circle size scales with estimated deaths.State-based Non-state One-sidedOutlines: Natural Earth.
Deadliest events, September 2025
Date
Where
Parties
Est. deaths
30 Sep 2025
Sumy raion Sumy oblast
Government of Russia vs Government of Ukraine State-based, 4 civilian, 2 sources
4
30 Sep 2025
Sumy oblast
Government of Russia vs Government of Ukraine State-based
2
29 Sep 2025
Sumy raion Sumy oblast
Government of Russia vs Government of Ukraine State-based
2
29 Sep 2025
Sumy oblast
Government of Russia vs Government of Ukraine State-based
2
28 Sep 2025
Sumy raion Sumy oblast
Government of Russia vs Government of Ukraine State-based
2 2–3
28 Sep 2025
Sumy oblast
Government of Russia vs Government of Ukraine State-based
2
28 Sep 2025
Sumy raion Sumy oblast
Government of Russia vs Government of Ukraine State-based
2
26 Sep 2025
Sumy raion Sumy oblast
Government of Russia vs Government of Ukraine State-based, 2 sources
2 2–3
26 Sep 2025
Sumy raion Sumy oblast
Government of Russia vs Government of Ukraine State-based
2
26 Sep 2025
Sumy raion Sumy oblast
Government of Russia vs Government of Ukraine State-based, 2 sources