>>8812969 (lb)

I did not know that the 3rd Infantry Regiment is also known as '"The Old Guard,"

"His largest unit, the 3rd Infantry Regiment, also known as "The Old Guard,"' normally supplies the spit-shined guards at the Tomb of the Unknown Soldiers and conduct the Army's most public events."

https://www.newsweek.com/exclusive-washington-dc-faces-coronavirus-spike-secret-military-task-force-prepares-secure-1498276 (paragraph 30)