USA HISTORY

Detailed explanation-1: -Conflict in Asia began well before the official start of World War II. Seeking raw materials to fuel its growing industries, Japan invaded the Chinese province of Manchuria in 1931. By 1937 Japan controlled large sections of China, and war crimes against the Chinese became commonplace.

Detailed explanation-2: -1937: Full-scale invasion of China.

Detailed explanation-3: -The war in China, 1937–41 Overt hostilities between Japan and China began after the Marco Polo Bridge incident of July 7, 1937, when shots were exchanged between Chinese and Japanese troops on the outskirts of Peking. Open fighting broke out in that area, and in late July the Japanese captured the Peking-Tientsin area.

Detailed explanation-4: -Marco Polo Bridge Incident, (July 7, 1937), conflict between Chinese and Japanese troops near the Marco Polo Bridge (Chinese: Lugouqiao) outside Beiping (now Beijing), which developed into the warfare between the two countries that was the prelude to the Pacific side of World War II.

Detailed explanation-5: -In 1934, Japan terminated the Five-Power Naval Treaty of 1922, which had limited its naval power in the Pacific. In 1937, Japan invaded China. In response, the League of Nations sponsored a conference at Brussels in November 1937.