A new alliance with England was sealed in the 1386 Treaty of Windsor; a year later Joao of Avis married Philippa of Lancaster, the daughter of John of Gaunt.
A new alliance was formed with England in the 1386 Treaty of Windsor just one year before Joao of Avis married Philippa of Lancaster.
Joao of Avis never married Philippa of Lancaster, the daughter of John of Gaunt.