Hitler launched a disastrous attack on the city of Stalingrad in September 1942, hoping to capture it before winter set in. However, Hitler refused to allow troops to retreat or surrender, even as they became surrounded, under-supplied, and suffered heavy losses from the bitter cold and fierce Soviet resistance. By February 1943, over 290,000 German troops had been trapped and killed or forced to surrender, marking a major defeat that halted the German advance into Russia.