England/Portugal, also known as EngPort or PortEng, is an uncommon pairing involving England and Portugal.
(WIP)
Treaty of Windsor[]
The Anglo-Portuguese Alliance ratified at the Treaty of Windsor in 1386, between the Kingdom of England and the Kingdom of Portugal, is the oldest alliance based on known history in the world that is still in force by politics – with the earliest treaty dating back to the Anglo-Portuguese Treaty of 1373.
Historically, the Kingdom of Portugal and the Kingdom of England, and later the modern Portuguese Republic and United Kingdom, have never waged war against each other nor have they participated in wars on opposite sides as independent states since the signing of the Treaty of Windsor. While Portugal was subsumed under the Iberian Union, rebellious Portuguese factions and governments in exile sought refuge and help in England. England spearheaded the Anglo-Spanish War (1585–1604) on the side of the deposed Portuguese royal house.
The alliance has served both countries throughout their respective military histories, influencing the participation of the United Kingdom in the Peninsular War, the UK's major land contribution to the Napoleonic Wars and the establishment of an Anglo-American base in Portugal. Portugal aided England (and later the UK) in times of need, for example, in the First World War.
Upon the declaration of war in September 1939 (WW2), the Portuguese Government announced on 1 September that the Anglo-Portuguese Alliance remained intact, but since the British did not seek Portuguese assistance, Portugal would remain neutral. In an aide-mémoire of 5 September 1939, the British Government confirmed the understanding. British strategists regarded Portuguese non-belligerency as "essential to keep Spain from entering the war on the side of the Axis."