Defense of the Great WallThe defense of the Great Wall () (January 1 – May 31, 1933) was a campaign between the armies of Republic of China and Empire of Japan, which took place before the Second Sino-Japanese War officially commenced in 1937 and after the Japanese invasion of Manchuria in 1931. It is known in Japanese as Operation Nekka and in many English sources as the First Battle of Hopei. During this campaign, Japan successfully captured the Inner Mongolian province of Rehe from the Chinese warlord Zhang Xueliang, and incorporated it into the newly created state of Manchukuo, whose southern frontier was thus extended to the Great Wall of China.
AnshanAnshan () is an inland prefecture-level city in central-southeast Liaoning province, People's Republic of China, about south of the provincial capital Shenyang. As of the 2020 census, it was Liaoning's third most populous city with a population of 3,325,372 people, over an area of about spanning from east to the west. Its built-up area encompassing the 4 Anshan urban districts (1,543,696 inhabitants), the 4 out of 5 urban Liaoyang districts (796,962 inhabitants, Gongchangling not being conurbated yet) and Liaoyang county largely being conurbated, was home to 2,712,789 million inhabitants in 2020.