Ukraine claims it now controls over 1,000 square kilometres of Russian territory, as it continues to advance . It's the most significant advance into Russian territory since Russia began its full-scale invasion of Ukraine in February 2022. Russian President Vladimir Putin has described the attack as "a major provocation" and said it was aimed at improving Ukraine's negotiating position in potential peace talks.

Ukrainian President Volodymyr Zelenskyy has said the cross-border offensive is "purely a security issue" that aims to capture "areas from which the Russian army struck at our Sumy region". Source: SBS News Ukraine's military chief Oleksandr Syrsky told Zelenskyy in a video posted on Monday that his troops were continuing "offensive operations" after seizing the territory. However, Russian officials said that Ukraine's incursion was only about 12km deep and 40km wide — less than half the size of the area that Kyiv claims it occupies.

Even if Ukraine's claim of having seized 1,000 square kilometres of Russia is correct, that's less than 0.006 per cent of Russia's total landmass of roughly 17,125,191. Meanwhile, Russia remains in control of around 20 per cent of Ukraine.

Source: SBS News The Ukrainian attack comes after months of slow but steady advances by Russian forces in the east that has forced Ukraine's troops onto the back foot as they try to withstand Russia's heavy use of gliding bombs and assault troops. Putin told a televised meeting with government officials.