By Louisa Moller, WBZ-TV

BOSTON (CBS) – The long lost sword of Colonel Robert Gould Shaw, the commanding officer of the North’s first all-black regiment during the Civil War, has been acquired by the Massachusetts Historical Society.

Shaw led the 54th Massachusetts Infantry into battle at Fort Wagner, South Carolina, in 1863. He was killed on the battlefield and his body was robbed of the sword.

READ MORE: Lawmaker Proposes Universal Mask Mandate In All Massachusetts Schools

Colonel Robert Gould Shaw’s sword

The sword was recovered in 1865 and returned to Shaw’s parents. But it disappeared again until it was recently discovered in a North Shore family attic by Mary Minturn Wood and her brother, descendants of Shaw’s sister, Susanna.

“I said, uh oh. There are three initials on it: RGS. And he went, oh, this is the sword,” Wood said.

Initials “RGS” on Colonel Robert Gould Shaw’s sword (WBZ-TV)

The family decided to gift the sword to the Massachusetts Historical Society where it is now in the hands of curator, Anne Bentley.

READ MORE: Peabody Police Help Track Down 5-Year-Old's Missing Wheelchair

“It’s just a magnificent specimen of a sword and it’s exactly what a colonel would carry in a war,” Bentley said.

For Bentley, the sword represents more than a weapon of war. It signifies the bravery of an African American regiment.

“What they did is they proved, beyond a shadow of a doubt, that they were as courageous and honorable and steadfast as any white regiment,” Bentley said.

MORE NEWS: 'Masks And Vax Required': Some Mass. Businesses Taking COVID Precautions Into Own Hands

The sword will be on display to the public at the Massachusetts Historical Society on July 18th.