For 10 points, name this military action which led to the establishment of the puppet state of Manchukuo.
In this act, the staged sabotage did not damage the railroad tracks much, but two hidden artillery pieces were fired on the orders of Colonel Seishir Itagaki at the nearby garrison commanded by "Young Marshal" Zhang Xuéliáng. The Chosen Army was sent in after Shigeru Honjo in Dàlián agreed to the plan ex post facto, as the commander of the Kwangtung Army, which seized Kirin and Liáoníng the week of the Mukden Incident. Chiang Kai-shek adhered to a non-resistance policy, with hostilities effectively ceasing after the fall of Harbin in Februrary 1932. For 10 points, name this military action which led to the establishment of the puppet state of Manchukuo.
In this act, the staged sabotage did not damage the railroad tracks much, but two hidden artillery pieces were fired on the orders of Colonel Seishir Itagaki at the nearby garrison commanded by "Young Marshal" Zhang Xuéliáng.
Japanese {invasion} of {Manchuria} (accept any answer having to do with Japan {invading Manchuria} but prompt on {China}, accept “{Mukden Incident}” before mentioned)