British historian Antony Beevor wrote that Dresden was considered relatively safe, having been spared previous RAF night attacks, and that at the time of the raids there were up to 300,000 refugees in the area seeking sanctuary from the advancing Red Army from the Eastern Front. In "Fire Sites", German historian Jörg Friedrich says that the RAF's bombing campaign against German cities in the last months of the war served no military purpose. He claims that Winston Churchill's decision to bomb a shattered Germany between January and May 1945 was a war crime. According to him, 600,000 civilians died during the allied bombing of German cities, including 72,000 children. He claimed some 45,000 people died on one night during the firestorms that engulfed Hamburg in July 1943.