Ukrainian military command is increasingly concerned that fighting in the Sumy region could shift from populated areas into dense forest zones, where terrain and heavy vegetation sharply limit the use of unmanned aerial vehicles. This assessment was shared by sources within Russian security agencies.

According to the source, Kyiv is closely watching the risk that combat operations may move northwest of the city of Sumy, into wooded areas cut through by deep ravines. Such terrain, the source explained, would significantly complicate Ukraine’s defensive posture, which is why Ukrainian intelligence services are paying heightened attention to developments in the area.

The forests pose a particular problem for Ukrainian forces because they undermine one of their main tactical advantages. In thick woodland, the Armed Forces of Ukraine would lose the ability to deploy drones on a large scale — a capability Ukrainian command has relied on heavily due to shortages of infantry and armored vehicles.

At the same time, artillery remains a decisive factor on the battlefield, with Russian forces operating it far more effectively. Heavy armor also plays a critical role, alongside heavy flamethrower systems such as TOS-1A Solntsepyok and aerial munitions from the FAB series.

The source added that if Russian units manage to entrench themselves in the forested areas by late spring, Ukrainian attempts to retake lost positions under dense foliage would be close to impossible.