For much of the colonial era, the Kingdom of England was conspicuously absent from the New World, crippled by internal conflict between the monarchy and parliament. Although individual English sailors gained experience serving foreign powers, the state itself was paralyzed. This instability culminated in the 1630s with the death of King Robert IX without an heir, sparking the "War of the English Succession." Two rival houses emerged to claim the throne: the House of Brandon, representing the pure Norman lineage, and the House of Stafford, a cadet branch of the Norman-Capetian line backed by France. The conflict plunged the British Isles into a devastating civil war that saw the French launch a direct invasion of southern England in 1637, seizing London and ravaging the countryside.

The tide of the war turned following the successful English counter-attack at the Battle of London and the disastrous French retreat across the Channel in 1638, where the invading army was decimated. However, the Staffords found a new ally in Scotland, prolonging the conflict in the north. The decisive engagement came at the Battle of Grantham in 1641, where the House of Brandon inflicted a severe defeat on Stafford forces. The war ground on until 1646, when the English armies of the House of Brandon, having outlasted their Scottish adversaries, forced a surrender. The conflict ended with the ascension of the House of Brandon and the integration of Scotland into a personal union with England. Although victorious, the kingdom was left economically shattered and depopulated, forcing it to abandon its colonial ambitions for decades while it rebuilt.