Composite Plantagenet dominion assembled by Henry II through inheritance (England, Normandy, Anjou, Maine, Touraine) and marriage to Eleanor of Aquitaine (Aquitaine, Poitou, Gascony), later adding the Lordship of Ireland (1177) and nominal overlordship of Brittany; at its height spanned England and roughly half of France, ruled from an itinerant court with no fixed capital (Angers and Chinon were favored seats).
Broken up by Philip II of France's campaigns of 1202-1204, which stripped King John of Normandy, Anjou, and Maine; the Truce of Chinon (1214) confirmed the loss of the continental heartlands, leaving the English crown only Gascony/Guyenne in the south until the Hundred Years' War.
The standard dedicated scholarly treatment of the Plantagenet dominion as a political and military unit.
The classic biography of the empire's founder, covering how the Angevin holdings were assembled and governed.