What famous supreme court case challenged the phrase under god?

The famous Supreme Court case that challenged the phrase "under God" in the Pledge of Allegiance was Newdow v. United States Congress. In 2002, Michael Newdow, an atheist and parent, argued that the inclusion of "under God" in the Pledge violated the Establishment Clause of the First Amendment. The Ninth Circuit Court initially ruled in his favor, but the Supreme Court ultimately dismissed the case in 2004 on procedural grounds, without addressing the constitutional question directly. The case highlighted ongoing debates over the intersection of religion and state in the United States.