Ukrainian forces are under intense pressure in Russia's Kursk region, where they grabbed a chunk of land last August and have held on to it through more than seven months of fierce fighting.

August 6, 2024: Ukrainian troops smash across the border in the biggest foreign attack on Russia since World War Two. The incursion hands Ukraine its biggest battlefield gains since 2022, after months on the back foot. Russia rushes in reserve troops, and nearly 200,000 Russian civilians are forced to flee their homes.