The Peloponnesians played a major role in the Greek War of Independence – the war began in the Peloponnese, when rebels took control of Kalamata on March 23, 1821. The Greek insurgents made rapid progress and the entire peninsula was under Greek control within a few months, except for a few coastal forts and the main Turkish garrison at Tripolitsa. The fighting was fierce and marked by atrocities on both sides; eventually the entire Muslim population was either massacred or fled to the forts. The capture of Tripolitsa in September 1821 marked a turning point. Rivalries among the insurgents eventually erupted into civil war in 1824, which enabled the Ottoman Egyptian vassal Ibrahim Pasha to land in the peninsula in 1825.