In the mid-17th century, all three kingdoms were involved in a series of connected wars (including the English Civil War) which led to the temporary overthrow of the monarchy and the establishment of the short-lived unitary republic of the Commonwealth of England, Scotland and Ireland.
Na segunda metade do século XVII, os tres reinos involucráronse nunha serie de guerras entre eles (incluíndo a Guerra Civil inglesa), que levaron ao derrocamento temporal da monarquía e o establecemento dunha república unitaria de curta duración, a Mancomunidade (Commonwealth) de Inglaterra, Escocia e Irlanda.