A symbolically important milestone - literally and figuratively.
The broader significance is that Ukrainian forces may now threaten Russian supply lines into the Donbas. JL
Chris Pleasance reports in the Daily Mail, image The Telegraph:
Ukrainian troops have reached the Russian border after successfully pushing Putin's forces away from the country's second-city of Kharkiv, as Putin's invasion continues to falter. Soldiers carrying a border marker painted in the colors of the Ukrainian flag and bearing the country's trident emblem filmed themselves planting the post somewhere along the frontier, to the north of Kharkiv. The footage was likely taken near Ternova - a town which Ukrainian troops entered on Saturday