Reign of Charles II of Navarre

Timeline

1. 1371–1375Navarre–Pyrenean passes · NavarreCharles II continued his tradition of two-faced diplomacy: allying with Charles V of France in 1371 while strengthening ties with Henry II of Castile through marriage contracts. In 1375 his son Carlos married Henry II's daughter, as Navarre sought to maintain independence and expand its power between the Portuguese-Castilian War and the Hundred Years' War.
2. 1378–1380Logroño–Briones · La RiojaIn 1378 Charles II was accused of poisoning the French king and his Norman lands were confiscated; his attack on the Castilian border city of Logroño failed. John of Gaunt at one point aided Navarre, but to secure Castilian neutrality Navarre signed the Treaty of Briones in 1379, forced to follow Castile–French policy and losing much of its independent diplomatic room.