As for the phrase Cold Harbor, that refers to a battle that took place in the Civil War in 1864 which the Confederates won, and it was considered one of the most lopsided battles in US history.
The Battle of Cold Harbor was fought in 1864 and saw the Confederacy earn a decisive win against the Union. In the show’s lore, Kier Eagan founded Lumon in 1865 when he was 24 years old.