Она была well-trained and well-equipped Kwantung Army,

А когда СССР разбил ее, она была: men remaining were largely semi-trained conscripts or raw recruits, equipped primarily as a counterinsurgency and border security force and able to use the massive fortifications

However, as the war situation began to deteriorate for the Imperial Japanese Army on all fronts, the huge, well-trained and well-equipped Kwantung Army could no longer be held in strategic reserve. Many of its front line units were systematically stripped of their best units and equipment, which were sent south against the forces of the United States in the Pacific Islands or the Philippines. Other units were sent south into China for Operation Ichi-Go.
At the time of the Manchurian Strategic Offensive Operation, when the Soviet Red Army invaded Manchukuo, Inner Mongolia, Korea and Japanese-held islands in August 1945, the Kwantung Army's strength was at around 1,320,000 men, with one armored division, 32 infantry divisions, six independent brigades, and up to 25 security battalions. However, the men remaining were largely semi-trained conscripts or raw recruits, equipped primarily as a counterinsurgency and border security force and able to use the massive fortifications to withstand the Soviet armored and mechanized infantry invasion.