 He participated in the Japanese Expeditionary force for the Siberian Intervention against the forces of the Bolshevik Army, supporting White Russian forces in Russia.After serving in a variety of administrative positions within the Imperial Japanese Army General Staff, including a stint as instructor at the Infantry School from 1932 to 1934, Iida was appointed commander of the 4th Imperial Guards Regiment from 1934 to 1935.He was subsequently Chief of Staff of the IJA 4th Division from 1935 to 1937.