Thomas Pelham-Holles

Newcastle was appointed Secretary of State for the Southern Department, a position he held for over 30 years. He managed British foreign policy, patronage networks, and parliamentary management, becoming a dominant figure in Whig politics.

As Prime Minister, Newcastle oversaw the early years of the Seven Years' War. His government faced military setbacks, including the loss of Minorca, leading to his resignation in 1756. He returned to power in 1757 in coalition with William Pitt the Elder.

Newcastle formed a political coalition with William Pitt the Elder, with Newcastle managing patronage and Pitt directing war strategy. This partnership led to British victories in the Seven Years' War, including the conquest of Canada.

After the death of George II and the accession of George III, Newcastle was dismissed as Prime Minister. His removal marked the end of the Whig supremacy and the rise of the King's favorite, Lord Bute.