Allied War Aims : just for show ?

My book ("Dawson's Plenty") is partially about a very bitter- if quiet - battle between the wartime allies 0f America and Britain and also within each of them.

 Were the highly publicized Allied "war aims" actually sincere - or just for show ?

 For a fleeting moment , the Allies moved into the light with a Pax Penicillia, before lapsing back to a Pax Urania with the same set of values that caused WWII in the first place.