My 322nd video all-time...
Freemasonry = 58; Secret Society = 58; Annuit Coeptis = 58; United States = 58
This was the event that made people want their own identity, separate from English colonists. The nation's identity was forged out of a March 22 massacre.
As for the 347 people dead, that is the 69th prime.
143-years later, the Stamp Act, which lead to the Boston Tea Part.
Checkout the Gematria of Boston Tea Party.
The divisors of 84 sum to 224.