Older millenial is full sleeve. Younger millennial is smaller Individual monochrome tattoos. And that’s how you can tell if someone is in their 30s or 40s

And before you read any of them. Start with the Brits. Gangs and Counter gangs by Frank Kitson PDF. A deeply evil man. He Set up plain clothes covert British soldiers in North of Ireland who would murder random civilians, to deliberately stoke sectarian chaos and justify British military presence