HISTORY: The Cowboys–Redskins rivalry
Dallas Cowboys - Wikipedia
Why is there a rivalry between the Philadelphia Eagles and the Dallas Cowboys? - Quora
Why is there a rivalry between the Philadelphia Eagles and the Dallas Cowboys? - Quora
Philadelphia Eagles - Wikipedia
Cowboys vs. Eagles: Upcoming Game Info & Rivalry History - Ticketmaster Blog
Dallas Cowboys - Wikipedia
Cowboys vs. 49ers: Upcoming Game Info & Rivalry History - Ticketmaster Blog