Message from OKW HQ:

Date: October 5, 1941

Situation Report: Our recent capture of Kharkov is a great victory. However, the enemy is bringing in troops to mount a counteattack. 

Operational Orders: The General Staff believes that a preemtive strike will catch the enemy off guard and with his units still dispersed. You will move out of Kharkov and destroy any enemy units you find in the area.
