Query: Who commanded the Imperial Japanese 11th Army on November, 1943?
Context: Around 1,700 Japanese troops died out of a total 10,000 Japanese soldiers who fell ill with disease when their own biological weapons attack rebounded on their own forces. On 2 November 1943, Isamu Yokoyama, commander of the Imperial Japanese 11th Army, deployed the 39th, 58th, 13th, 3rd, 116th and 68th divisions, a grand total of around 100,000 troops, to attack Changde of China. During the seven-week Battle of Changde, the Chinese forced Japan to fight a costly war of attrition.