The Treaty of Windsor of 1386 resulted in the longest British alliance, with which country?
Treaty of Windsor (1386) Treaty of Windsor (1386) The Treaty of Windsor is the diplomatic alliance signed between Portugal and England on 9 May 1386 at Windsor and sealed by the marriage of King John I of Portugal (House of Aviz) to Philippa of Lancaster, daughter of John of Gaunt, 1st Duke of Lancaster. With the victory at the Battle of Aljubarrota, assisted by English archers, John I was recognized as the undisputed King of Portugal, putting an end to the "interregnum" of the 1383–1385 Crisis. The Treaty of Windsor established a pact of mutual support between the countries. This document is preserved at
Treaty of Győr (1386) Treaty of Győr (1386) The Treaty of Győr (also known as the Treaty of Raab) was concluded between the Hungarian queen dowager and regent, Elizabeth of Bosnia, and Sigismund of Luxembourg in Győr in April 1386. Sigismund married Elizabeth's daughter Mary, Queen of Hungary, in 1385, but was unable to immediately assert his "jure uxoris" right to the crown of Hungary due to King Charles III of Naples's invasion. In April 1386, Sigismund's brother Wenceslaus IV of Bohemia and the large Bohemian army escorted Sigismund to Hungary. Elizabeth was then compelled to sign the treaty by which Sigismund was recognized