Aleutian Campaign was a diversion. Nothing more, nothing less. Japanese put minimal effort and if given time, they would have withdrawn from Attu if they could - for someplace more important. They did a very skillful withdrawal from Kiska right under our noses, one of their last major naval accomplishments before it all went under. As a diversion, it was about as stupid as one can get from America's favorite Japanese admiral, Yamamoto, who by the way, never won a battle nor a campaign that he commanded (yet we had him shot down for some strange reason when he was winning the war for us).  Aleutian Campaign did, however, aided Alaska in ways that is beyond counting. Alcan, military development, rail development, Adm. Yamamoto did more to promote Alaska statehood thanks to his diversion. Aleut people did suffered and yes, it was no doubt racism probably aided by the fact that Aleut people looked closer to their Japanese enemy then to white people!! Connect the dots here!!!