Nations of Eryr Wen Europe: 1965-? Wales:1928-1971 A Constituent Nation of the United Kingdom of Great Britain and Northern Ireland since 1928 it was Peaceful until the Town of Trywern was flooded to Create a resrvoir for Liverpool. This led to the rise of Nationalist Free Wales Army led by Cadwydd Cadifrog William Julian Cayo-Evans. Under WJ Cayo-Evans Protest in Northern Wales that was broken up with beatings by the North Wales Police in 1966 later that year British Prime Minister Harold Wilson is shot and killed by three Gwiffoddolwr men under orders from WJ Cayo-Evans.