North America 4, also known as IRB North America 4, was a North American rugby union competition launched in 2006.
nˈɔːɹθ ɐmˈɛɹɪkə fˈoːɹ, ˈɔːlsoʊ nˈoʊn æz ˌaɪˌɑːɹbˈiː nˈɔːɹθ ɐmˈɛɹɪkə fˈoːɹ, wʌzɐ nˈɔːɹθ ɐmˈɛɹɪkən ɹˈʌɡbi jˈuːniən kˌɑːmpətˈɪʃən lˈɑːntʃt ɪn tˈuː θˈaʊzənd sˈɪks.