sentences:  However, it proved hopelessly inadequate during the Pacification of Manchukuo, and the Japanese instituted numerous training programs in an attempt to raise its capabilities.Reserve or retired Japanese officers were assigned to the Sungari Fleet, and Manchukuo cadets were sent to study navigation and gunnery at the Imperial Japanese Navy Academy.In November 1938, IJN units were withdrawn from Manchukuo, ostensibly because the training levels of the Imperial Manchukuo Navy had risen to acceptable levels, but in reality because of the ongoing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.