In Lisbon, Alvaro Pais proposed that he and Leonor marry and hold the regency together, but Leonor declined; upon the news of the coming of the Castilian king, the Master of Aviz was elected Regent and Defender of the Realm on 16 December 1383, as an advocate for the rights of the queen's son, the Infante Juan. The distinguished jurist João das Regras was appointed as chancellor and the brilliant general Nuno Álvares Pereira as constable; immediately England was requested to intervene. The Master of Aviz tried to besiege Leonor at Alenquer but fled to Santarém to prepare the defense of Lisbon. In Santarém, Leonor proceeded to raise an army and sought help from John I of Castile, who decided to take command of the situation in Portugal, and left a Regency Council consisting of the Marquis of Villena, the Archbishop of Toledo and the Steward of the King to rule Castile in his absence. In January 1384 he began the journey to Santarém with Beatrice to answer the call of the Queen Regent to restore order in Portugal. On 13 January King John I and Queen Beatrice obtained the waiver of the rule and the government in their favour, which caused many knights and castle lords to submit and swear allegiance to the royal couple. Since Leonor had conspired against John the Infante, she was sent to the monastery of Tordesillas. This served the purposes of the Master of Aviz to justify his leading the revolt; he had violated the oath he swore at the Treaty of Salvaterra de Magos.
In Lisbon, Alvaro Pais proposed that he and Leonor marry and hold the regency together, but Leonor declined; upon the news of the coming of the Castilian king the Master of Aviz was elected Regent and Defender of the Realm on 16 December 1383, as an advocate for the rights of the queen's son, the Infante Juan. The distinguished jurist João das Regras was appointed as chancellor and the brilliant general Nuno Álvares Pereira as constable; immediately England was requested to intervene. The Master of Aviz tried to besiege Leonor at Alenquer but fled to Santarém to prepare the defense of Lisbon. In Santarém, Leonor proceeded to raise an army and sought help from John I of Castile, who decided to take command of the situation in Portugal, and left a Regency Council consi.sting of the Marquis of Villena, the Archbishop of Toledo and the Steward of the King to rule Castile in his absence. In January 1384 he began the journey to Santarém with Beatrice to answer the call of the Queen Regent to restore order in Portugal On 13 January King John I and Queen Beatrice obtained the waiver of the rule and the government in their favour, which caused many knights and castle lords to submit and swear allegiance to the roy,al couple. Since Leonor had conspired against John the Infante, she was sent to the monastery of Tordesillas. This served the purposes of the Master of Aviz to justify his leading the revolt; he had violated the oath he swore at the Treaty of Salvaterra de Magos.