An outbreak of student demonstrations that protested China’s response to the Treaty of Versailles, which including China giving up territories to Japan. These were anti-imperialist protests, resulting in cultural and political movements, as well as a rise in nationalism.
The violent suppression of communists in Shanghai by GMD military forces, later leading to full scale purge. This would increase tensions between the two competing ideological groups.
A war between GMD, supporting the republic of China, versus the CCP. It started due to an ideological battle, when both parties wanted to be the sovereign government of China.
Following the Northern Expedition, Jiang claims paramount leadership of China, however there is no real victor to the war at this point.
The Kwantung Army of Japan invaded Manchuria. This occupation would last for five months, and was the initial invasion that would lead to a war between the nations, motivating an alliance between the GMD and CCP.
Also known as the Shanghai incident, it was a conflict between China and Japan prior to the actual war that would begin in 1937. It concluded in a ceasefire, but would ultimately cause tensions, resulting in the Sino-Japanese War.