Whether the District Court's determination that Munsingwear complied with the price regulation precluded the United States from relitigating that issue in its treble-damages actions.
Holding
Yes. The unmodified judgment in the injunction action conclusively established the pricing issue between the same parties.
Reasoning
The pricing formula under the federal regulation was the central issue in both the injunction action and the treble-damages actions. The parties were also identical, and the District Court had jurisdiction over both the parties and the subject matter when it decided the injunction case.
Under the established rule of res judicata, a right, fact, or question that was distinctly put in issue and directly determined by a court of competent jurisdiction cannot be disputed in a later suit between the same parties. That principle applies even when the later suit rests on a different claim, so long as the earlier judgment remains unmodified.
The first judgment determined that Munsingwear had not violated the regulation. Because that determination remained in force, it settled the same issue for purposes of the later claims for treble damages. The rule serves the important functions of ending litigation and providing certainty in legal relations.