What was the outcome when Congress declared the land grant requested by Charles Beaubien and Guadeloupe Miranda to be valid?

The outcome when Congress declared the land grant requested by Charles Beaubien and Guadeloupe Miranda to be valid was that Congress established the grant, but it was not within legal limits. This situation arose because the complex history of land grants in New Mexico involved various factors, including the transition from Mexican to U.S. governance and numerous issues regarding land rights and ownership.

When Congress reviewed the land grant, it recognized certain legal aspects but found discrepancies with the grant's adherence to the established legal framework. This meant that while Congress acknowledged the grant, it ultimately could not be recognized as valid in its entirety due to compliance issues with the legal standards set for land grants. This decision reflected broader tensions related to land ownership after the U.S. acquired New Mexico, as many grants were challenged or invalidated based on the new legal interpretations and policies.

Other options, such as all owners having clear title or establishing Maxwell and his heirs as permanent owners, would imply a straightforward legitimization of the land ownership that did not fully account for the complexities of legal validity and territorial governance. Meanwhile, the idea that the land became property of the United States does not encompass the nuances of the congressional decision, which acknowledged the grant but also highlighted its invalidity concerning legal parameters.