Ukraine War Death Toll: Huge But Not Fully Known

Russia's invasion of Ukraine has resulted in thousands of deaths (Credit: AFP)

On Kyiv's central square, hundreds of names and photographs with Ukrainian flags on them fill a memorial honouring troops killed in combat during three years of war with Russia.

But as US President Donald Trump steps up efforts to secure a ceasefire to end the bloodshed, the true death toll of the three-year conflict remains unknown.