Ukrainian President Volodymyr Zelenskyy said Sunday the daring military incursion into Russia’s Kursk region aims to create a buffer zone to prevent further attacks by Moscow across the border.

It was the first time Zelenskyy clearly stated the aim of the operation, which was launched on Aug. 6. Previously, he had said the operation aimed to protect communities in the bordering Sumy region from constant shelling.

Zelenskyy said “it is now our primary task in defensive operations overall: to destroy as much Russian war potential as possible and conduct maximum counteroffensive actions. This includes creating a buffer zone on the aggressor’s territory -– our operation in the Kursk region,” he said in his nightly address.