From the comfort women to Unit 731 and the Nanking Massacre, millions of people were victims of the Japanese army and navy. On the verge of losing the war, the Japanese simply lost the map and became out of control. Their behavior had long been adopted by the troops but worsened as the war continued. The mass execution of prisoners of war and civilians was an integral part of operations and planning. The 10th Army used gas during the Nanjing invasion and the whole thing was planned as an integral part of the operation. Many Chinese people were burned alive during the siege of the city. Commander Nakajima, in his diary, stated: "between December 11 and 13, 1937, I had to coordinate the procurement of several trucks to transport the prisoners to graves capable of accommodating seven or eight thousand corpses."