Answer:
There were multiple factors that contributed to the Japanese soldiers killing so many civilians in Nanjing, China during the Second Sino-Japanese War, including extreme nationalism and militarism, the brutal nature of the war, and logistical and organizational issues within the Japanese army.
Explanation:
There were a number of factors that contributed to the brutality of the Japanese soldiers during the Nanjing Massacre. One of the main reasons was the extreme nationalism and militarism that characterized Japanese society at the time. Many Japanese soldiers believed that they were a superior race and that the Chinese were inferior and deserving of punishment.
Another factor was the brutal nature of the war itself. The Japanese army had been engaged in a long and costly campaign in China, and many soldiers were suffering from battle fatigue and other psychological problems. Some historians have also suggested that the Japanese leadership deliberately encouraged their soldiers to engage in brutal tactics in order to intimidate the Chinese population and crush any resistance to Japanese rule.