The Soviet victory in the Battle of Stalingrad on 2 February 1943 was a turning point in the war. US President Franklin D. Roosevelt announced the prosecution of those mainly responsible for war and genocide on 12 February, which the US Congress agreed to on 18 March. US and British troops landed on Sicily on 7 July 1943 and successfully invaded the Italian mainland on the 3 September, and after the Italian armistice on 8 September, gradually advanced northward.