Of course, Li Gang was not killing his men.

"The second prince is clearly too naive. He thought by sending a general from the imperial army over here could he plant his henchman in the main force of Chang'an and then infiltrate to the whole force. What he doesn't know is that the hunters who are most skilled at setting up traps are prone to fall in traps by the end."

At the time, the armored soldiers he killed were all Meng Wu's trusted subordinates. ...