جون الاول - العظيم

يتمه: مات ابوه وعمره 9 سنوات.
مجاله: قائد عظيم.

John I (or João I, Portuguese pronunciation: [ʒuˈɐ̃w̃]; Lisbon, São
João da Praça (extinct), 11 April 1358 – Lisbon, Castle, 14 August 1433), called the Good (sometimes the Great) or of Happy Memory, more rarely and outside Portugal the Bastard, was the tenth King of Portugal and the Algarve and the first to use the title Lord of Ceuta. He was the natural son of Peter I by a woman named Teresa Lourenço, who some say was a noble Galician, daughter of Lourenço Martins, o da Praça, and wife Sancha Martins.

Peter I (Portuguese: Pedro, pronounced [ˈpedɾu]; 19 April 1320 – 18 January 1367), called the Just (Portuguese: o Justiceiro), was the eighth King of Portugal and the Algarve from 1357 until his death. He was the third but only surviving son of Afonso IV of Portugal and his wife, princess Beatrice of Castile.

In 1364 he was created Grand Master of the Order of Aviz, by which title he was known. He became king in 1385, after the 1383–1385 Crisis.
On the death of his half-brother Ferdinand I in October 1383, without a male heir, strenuous efforts were made to secure the succession for princess Beatrice, Ferdinand's only daughter. As heiress presumptive, Beatrice had married king John I of Castile, but popular sentiment was against an arrangement in which Portugal would have become virtually united with Castile. The 1383–1385 Crisis followed, a period of political anarchy, when no monarch ruled the country.
On 6 April 1385, the council of the kingdom (cortes in Portuguese) met in Coimbra and declared John, then Master of Aviz, king of Portugal. This was in effect a declaration of war against Castile and its claims to the Portuguese throne. Soon after, the king of Castile invaded Portugal, with the purpose of conquering Lisbon and removing John I from the throne. John I of Castile was accompanied by French allied cavalry while English troops and generals took the side of John (see Hundred Years War). John I then named Nuno Álvares Pereira, his loyal and talented supporter, general and protector of the Kingdom. The invasion was repelled during the summer after the Battle of Atoleiros and, especially, the decisive battle of Aljubarrota ( 14 August 1385), where the Castilian army was virtually annihilated. John I of Castile then retreated and the stability of John I's throne was permanently secured