St. Valentine's Day Massacre (2) tv-pg Play video Select your TV provider to log in to have full access to videos Select your TV provider See all providers Don't see your TV provider? Learn more You can access this video on the free HISTORY® apps. *You must verify your TV provider towatch this video on the App Your Parental Control settings do not allow you to view this content. St. Valentine's Day Massacre (2 min) tv-pg Valentine's Day in 1929 was one of the bloodiest days in mob history when 7 men were gunned down in Chicago. Al "Scarface" Capone rose to power after a rival gang was in shambles as a result of the killings.