Au FBI.

This is coolbert:

Au = Gold.

Within the military dimension the long-lost hidden treasure has been found? American Civil War. 

"Did the FBI [Federal Bureau of Investigation] Find $400M in Civil War Gold in a Pa. Forest? Harrisburg Lawyer Says He Has New Clue in the Case"

Courtesy the tip from Freeper the incident as reputed to have occurred several years ago now..

"A Harrisburg attorney said Thursday that a state appeals court has just given him the next clue toward hopefully solving the mystery of whether the FBI dug up a cache of lost Civil War gold worth about $400 million [USD] from a remote Pennsylvania forest nearly three years ago"

American FBI unearthing a treasure trove of gold, buried from the time of the American Civil War. Three years ago now as alleged. The claim is in the courts for all that time without resolution. 

As to the value of the treasure consisting of:

"26 or 52 bars [each] weighing 50 pounds [22 1/2 kilograms]  $56 million USD. Based on a gold price of $1,800 USD per ounce [28 grams].

See previous blog entry with many additional links:

https://militaryanalysis.blogspot.com/2020/12/boudicca.html

And to all this J. Edgar would say?

coolbert.