Both conferences were created as part of the 1970 merger between the National Football League, and the American Football League (AFL).
bˈoʊθ kˈɑːnfɹənsᵻz wɜː kɹiːˈeɪɾᵻd æz pˈɑːɹt ʌvðə nˈaɪntiːnhˈʌndɹɪd sˈɛvənti mˈɜːdʒɚ bᵻtwˌiːn ðə nˈæʃənəl fˈʊtbɔːl lˈiːɡ, ænd ðɪ ɐmˈɛɹɪkən fˈʊtbɔːl lˈiːɡ ˌeɪˌɛfˈɛl.