Entering of the gate — To prevent their retreat into the city, and give the other two companies opportunity to cut them off.
Related Commentaries of Judges 9:44
Judges 9:44
44 And Abimelech, and the company that was with him, rushed forward, and stood in the entering of the gate of the city: and the two other companies ran upon all the people that were in the fields, and slew them.