July 1, 1921 is a date featured in "Battle of the Century". Events of the day include:
- Nucky Thompson and Owen Sleater arrive in Belfast, Ireland.
- Jimmy Darmody, Lucky Luciano, Meyer Lansky, Al Capone and Mickey Doyle meet with corrupt medicinal alcohol distributor George Remus and arrange to buy his supply routes so that they can hijack, reconstitute and sell his liquor.
- Jimmy and Richard Harrow meet with Waxey Gordon and give permission for him to have Manny Horvitz killed.
- Emily Schroeder develops paralysis of her lower limbs and is admitted to the Atlantic City Children's Hospital.