Russia claims control of two settlements, Ukraine claims to strike Russian military personnel and equipment.

The Russian Ministry of Defense reported on the 18th that the Russian army has captured Kharkivka in the Sumy region and Krynichne in the Zaporizhzhia region, and has struck at fuel depots, energy facilities, long-range drone launch sites used by the Ukrainian army, as well as temporary deployment points of the Ukrainian armed forces and foreign mercenaries.

On the same day, the General Staff of the Ukrainian Armed Forces stated that as of 10 PM local time on the 18th, there had been a total of 201 combat incidents in the frontline areas, including 16 attacks launched by the Russian army in the direction of Konstantinovka, where the Ukrainian army struck at Russian personnel and equipment.
Russian forces captured Kharkivka and Kreminna in the Sumy and Zaporizhzhia regions on October 18. They conducted strikes against Ukrainian fuel depots, energy facilities, and drone launch sites. The Ukrainian Armed Forces reported 201 combat incidents, with 16 attacks from Russian forces in the Konstantinovka direction, and retaliatory strikes against Russian personnel and equipment.
- Russian forces captured Kharkivka and Kreminna on October 18.
- Ukrainian forces reported 201 combat incidents on the same day.
- Russian forces launched 16 attacks in the Konstantinovka direction.
- Strikes were conducted against Ukrainian fuel depots and energy facilities.
- Ukrainian forces targeted Russian personnel and equipment in response.