He concentrated up to half of his entire force in this area, using concealment techniques to ensure there was not a corresponding build-up of German forces, and attempting to convince the German command that the main axis of attack would be towards Riga.
He gathered up to half of his total forces in this region, employing concealment tactics to prevent a buildup of German troops, and attempting to persuade the German command that the primary assault would be directed towards Riga.