The English–Portuguese alliance was renewed in 1386 with the Treaty of Windsor and the marriage of João I of Aviz with Philippa of Lancaster, daughter of John of Gaunt. The treaty, still valid at the present time, established a pact of mutual support between the countries. Portugal used it again against its neighbours in 1640, to expel the Spanish kings again from the country.With the victory at the [Battle of Aljubarrota], João I was recognized as the undisputed king of Portugal, putting an end to the interregnum and anarchy of the 1383–1385 crisis . Recognition from Castile would arrive only in 1411, with the signature of the Treaty of Ayton-Segovia .