Henry V of England of the influential John of Gaunt, and great-grandson of Edward III of England. At the time of his birth, Richard II, his first cousin once removed, was king. Henry's grandfather, John of Gaunt, was the king's guardian. As he was not close to the line of succession to the throne, Henry's date of birth was not officially documented; and for many years it was disputed whether he was born in 1386 or 1387. However, records indicate that his younger brother Thomas was born in the autumn of 1387 and that his parents were at Monmouth in 1386 but not in
John of Gaunt into full alliance with England, that he was actually able to land with an army in Spain and mount a campaign for the throne of Castile (that ultimately failed). John sailed from England on 9 July 1386 with a huge Anglo-Portuguese fleet carrying an army of about 5,000 men plus an extensive 'royal' household and his wife and daughters. Pausing on the journey to use his army to drive off the French forces who were then besieging Brest, he landed at Corunna in northern Spain on 29 July. The Castilian king, John of Trastámara, had expected John would land in