 This brought all their forces under a unified command.Calling for civilians to form volunteer units and join in the defense of the city, the army reached a strength of 30,000 men in six brigades of Zhang Xueliangs Northeastern army.Jilin Self-Defense Corps – Commander-in-Chief Li Du

The defense of Harbin was at first successful and succeeded in repulsing the Manchukuo forces sent against them for a time.