 In the summer of 1942, after the US had entered World War II, Warner (then age 65) was asked to return to the Navy, to serve as Chief Civilian Aid to Commander Charles Bittinger (his close friend from earlier years) in the design of ship camouflage.As the techniques for observation had changed in the years since World War I, so too did ship deception needs.While much of World War II American ship camouflage was disruptive and deceptive (rather than directed toward invisibility), its newly restrained, geometric style (akin perhaps to Modern Art) was vastly different from the dazzle designs of the previous war.