There were about 70,000 people living in Bakhmut before the invasion, but only a few thousand remain in the devastated city, once best known for its salt and gypsum mines and huge winery. The US believe over 20,000 Russian soldiers had been killed in the battle for Bakhmut and another 80,000 wounded. Ukraine has not released figures on its Bakhmut casualties, but there have been heavy losses. Capturing Bakhmut would bring Russia slightly closer to its goal of controlling all of Donetsk region, one of four regions annexed by Russia following referendums widely condemned outside Russia as a sham. Russia's Wagner mercenary group has started withdrawing from Bakhmut and has vowed to transfer control of the city to the Russian army by 1 June, but Kyiv says it still controls pockets of the city.