Kyiv, Dec 20 : President Volodymyr Zelensky said Tuesday that there was no end in sight to Russia's invasion of Ukraine, as fatigue builds among Kyiv's allies nearly two years into the war and the Kremlin voices growing confidence of victory.

Zelensky said he had turned down a request from the military -- for now -- to mobilise as many as 500,000 Ukrainians for the army, an unpopular proposal that could hit his worsening poll ratings among Ukrainians.  His meeting with local and foreign journalists wraps up a difficult year in Ukraine, with Kyiv's forces under pressure on the front and allies wavering on military and financial backing. 

"No one knows the answer," Zelensky told reporters in response to a question of whether the war with Russia could end next year.  "Even respected people, our commanders and our Western partners, who say that this is a war for many years, they do not know," he said.  The question of how long Western countries will provide essential support for Kyiv has grown increasingly urgent.