Manchukuo Imperial Army
In November 1938, IJN units were withdrawn from Manchukuo, ostensibly because the training levels of the Imperial Manchukuo Navy had risen to acceptable levels, but in reality because of the ongoing political conflict between the Japanese army and navy over who had control over Manchuria. In November 1939 the navy came under the control of the Manchukuo Imperial Army, and was renamed River Force (江上軍).