I don't know if you will find this information interesting or not, but I know a person who is a member of our tulsa civil war round table who went out an d metal detected a site somewhat to the north of Fort Washita and found quite a bit of evidence of a battle happened at it. They found two distint areas or lines of artifacts of bullits and shell fragments. He has told me that he thinks this was part of the campaign by Phillips and that a fight did happen.
curtis