The Principality of Dorne was an independent principality in Westeros. It was founded during the Nymeria's War by Mors Martell and Nymeria. During the War of Conquest, the Principality of Dorne remained unconquered and independent of the Targaryens. During the Conquest of Dorne, the Principality of Dorne was invaded again by the Targaryens. Dorne was conquered and occupied for four years. During the occupation, a Dornish insurgency fought against the invaders and four years later the Principality of Dorne was restored.