Nearly three years after President Vladimir Putin invaded Ukraine, his troops are making steady progress on the battlefield.

Russian President Vladimir Putin and U.S. President Donald Trump have yet to discuss a possible meeting, CNN quoted Kremlin spokesman Dmitry Peskov as saying. It cited Peskov as saying there had been no initial contacts between the two leaders about whether such a meeting was needed or where and how it might take place if it did happen.

That will take some doing. Putin remains uninterested in peace talks as long as Russian troops continue to gain ground in Ukraine’s east, albeit at a slow pace, and while Ukrainian forces hold seized territory in the Kursk region inside Russia, according to John Herbst, a former U.S. ambassador to Ukraine, and other former officials.