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 amassed approximately half of his overall military strength in this area, utilizing camouflage methods to avoid any indication of an increased German presence, and endeavoring to make the German leadership believe that the main thrust of attack would head toward Riga.