Ukraine has launched an offensive toward the captured southern city of Kherson, but whether it marks the start of a long awaited attempt to retake large slices of territory lost at the start of Russia’s invasion remains unclear.

Officials in Kyiv have for months been promising such a campaign, while using U.S. long-range HIMARS rocket systems to degrade Russian supply lines and communications in preparation.

In a video address late Monday, Ukrainian President Volodymyr Zelenskyy recommitted to driving Russian forces from all Ukrainian territory, including Crimea and areas of the eastern Donbas region lost in 2014. Yet he also avoided commenting on the details of the operations.