hiː wʌz ʌnwˈɪlɪŋ tə lˈiːv ðə ɹˈiːdʒənsi tʊ ˌɛni ʌv hɪz æmbˈɪʃəs ænd ʌntɹˈʌstwɜːði bɹˈʌðɚz hˌuː ˈɔːlmoʊst kˈɔːzd wˈɔːɹ bᵻtwˌiːn kˈæstaɪl ænd ˈæɹæɡən ˌɔn sˈɛvɹəl əkˈeɪʒənz.
He was unwilling to leave the regency to any of his ambitious and untrustworthy brothers who almost caused war between Castile and Aragon on several occasions.