Adolf Hitler ordered the termination of the overflights in 1934 after he signed a nonaggression treaty with Poland since these reconnaissance missions might be discovered and jeopardize the treaty.[13] Patzig was fired in January 1935 as a result, and sent to command the new pocket battleship Admiral Graf Spee; he later became Chief of Naval Personnel. His replacement was another Reichsmarine captain, Wilhelm Canaris.[14]