The Supreme Court case of State of Oklahoma v. State of Texas, United States, Intervener in 1924 was a dispute over the ownership and control of oil-rich lands along the Red River boundary between Oklahoma and Texas. The controversy arose due to differing interpretations on where exactly the border lay; whether it was at the river's south bank or along its medial line. In this case, an intervener is a third party that joins an ongoing lawsuit because they have an interest in the subject matter but were not named as part of original litigation. Here, U.S government intervened since it had interests in these disputed lands through various Indian tribes under federal guardianship. The court ruled that according to earlier treaties with Native American tribes and subsequent acts by Congress, jurisdiction belonged to Oklahoma up until "the edge" (south bank) while submerged areas within riverbeds fell under federal trusteeship for benefitting respective tribes rather than state ownership. This decision clarified boundaries between states regarding riparian rights (those relating to banks of rivers), established precedent for future interstate disputes involving water bodies as borders and affirmed Federal trust responsibility towards native tribal nations.

In the dissenting opinion for the case of State of Oklahoma v. State of Texas, Justice McReynolds expressed his disagreement with the majority's decision to grant ownership rights over a disputed portion of the Red River bed to Texas. He argued that historical evidence and previous legal precedents clearly established Oklahoma's claim over this territory. According to him, treaties signed between Spain and France in 1819 had recognized this area as part of Louisiana (which later became part of Oklahoma). Furthermore, he pointed out that Congress had never intended or acted upon changing these boundaries when it admitted both states into Union. Therefore, he believed that by awarding this land to Texas based on its riparian laws was not only incorrect but also an infringement on federal authority which has exclusive power over interstate boundary disputes.