 17 divisions, including 500,000 men, 15,000 vehicles, 6,000 artillery pieces, 800 tanks and 100,000 horses participated in this operation.The Japanese included Kwantung Army units and equipment from Manchukuo, mechanized units, units from the North China theater and units from mainland Japan to participate in this campaign.It was the largest land campaign organized by the Japanese during the entire Second Sino-Japanese War.