During this period a number of uprisings against the Ottoman Empire periodically broke out. In the Orlov Revolt (1770) several units of Riziotes, Chormovites and Himariotes supported the armed operation. Some Greeks from the area took also part in the Greek War of Independence (1821–1830): many locals revolted, organized armed groups and joined the revolution. The most distinguished personalities were the engineer Konstantinos Lagoumitzis from Hormovo and Spyromilios from Himarë. The latter was one of the most active generals of the revolutionaries and participated in several major armed conflicts, such as the Third Siege of Missolonghi, where Lagoumitzis was the defenders' chief engineer. Spyromilios also became a prominent political figure after the creation of the modern Greek state and discreetly supported the revolt of his compatriots in Ottoman-occupied Epirus in 1854. Another uprising in 1878, in the Saranda-Delvina region, with the revolutionaries demanding union with Greece, was suppressed by the Ottoman forces, while in 1881, the Treaty of Berlin awarded to Greece the southernmost parts of Epirus.