In 1812, the US was at war with England. The US was concerned that some former-English subjects might work on behalf of the Crown, who historically used the promise of titles and lands to bribe such traitors.

That "missing" proposal was called the “Titles of Nobility Amendment” (or TONA). It sought to ban any American citizen from receiving any foreign title of nobility or receiving foreign favors, such as a pension, without congressional approval. The penalty was loss of citizenship.

The bill passed Congress, but fell just short of being ratified. Or did it?

https://constitutioncenter.org/blog/the-case-of-the-missing-13th-amendment-to-the-constitution/

In the 1980s, historical researchers started finding copies of the Constitution from the pre-Civil War era that had TONA listed as the 13th Amendment. The premise was that Virginia’s legislature had approved the amendment in 1819, but somehow, it was never listed as accepted by the federal government. President James Monroe asked his Secretary of State, John Quincy Adams, to confirm that the TONA was never ratified, which he did. This subject is still up for debate.

Many older copies of the Constitution predating 1865 had the original 13th Amendment listed, but when the new 13th Amendment was passed, it disappeared into the dustbins of history.

Now why would anyone ratify an Amendment and then disappear it? Who would benefit from that?

The American Bar Association wasn't founded until 1878, but legal practitioners were forming a predecessor to the BAR right around 1810.

Why is this important? Because BAR is short for British Accreditation Regency. A foreign title that would have expelled all of the lawyers and judges from the US. Draw your own conclusions......

Note: this is a debated history, but it has not been debunked and there is quite a bit of real documentation to support it.