Brusilov's plan was approved, and he massed 40 infantry divisions and 15 cavalry divisions in preparation for the Brusilov Offensive. Deception efforts included false radio traffic, false orders sent by messengers who were intended be captured, and equipment displays including dummy artillery to mislead Austria-Hungary as to the location of his units. Beginning in June 1916, Brusilov's surprise offensive caused Germany to halt its Western front attack on Verdun and transfer considerable forces to the Eastern front. It also effectively knocked Austria-Hungary out of the war, depriving Germany of its most important ally.