World War II marked by 50 to 85 million fatalities, most of whom were civilians in the Soviet Union and China. It included massacres, the genocide of the Holocaust, strategic bombing, premeditated death from starvation and disease, and the only use of nuclear weapons in war. Japan, which aimed to dominate Asia and the Pacific, was at war with China by 1937, though neither side had declared war on the other. World War II is generally said to have begun on 1 September 1939, with the invasion of Poland by Germany and subsequent declarations on Germany by France and the United Kingdom. From
Scuba diving fatalities he is then unable to cope with surface conditions. In the ANZ survey, 52% of the fatalities had buoyancy problems. Most of these were due to inadequate buoyancy, but 8% had excessive buoyancy. In the DAN survey buoyancy problems were the most common trigger event leading to death. Buoyancy changes associated with wetsuits were found to be a significant factor. Based on a formula for approximate weight requirement based on wetsuit style and thickness, 40% of the divers who died were found to be grossly over-weighted at the surface. This would have been aggravated by suit compression at depth. A