Why did japan seize manchuria and north china

The Japanese invasion of Manchuria began on September 18, 1931, when the Kwantung Army of the Empire of Japan invaded Manchuria immediately following the Mukden Incident. The Japanese established a puppet state called Manchukuo, and their occupation lasted until the end of World War II.

The articles created a national government composed of a congress, which had the power to declare war, sign treaties, make alliances and more.