Greek fire

incendiary weapon used by the Eastern Roman (Byzantine) Empire developed c. 672

8 dated entries naming Greek fire, drawn from 8 separate years between 515 CE and 1219 CE. Nothing here is written by us: each line is the sentence a Wikipedia year article used, and the link beside it opens the exact revision.

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6th century

515Emperor Anastasius I gives Marinus, former praetorian prefect of the East, command over the Byzantine army. He defeats the rebel fleet at the harbor entrance, using a sulfur-based chemical substance, similar to the later Greek fire.source

7th century

678Autumn – Siege of Constantinople: Emperor Constantine IV confronts the Arab besiegers in a head-on engagement. The Byzantine fleet, equipped with Greek fire, destroys the Muslim fleet at Sillyon, ending the Arab threat to Europe, and forcing Yazid (a son of caliph Muawiyah I) to lift the siege on land and sea. The victory also frees up forces that are sent to raise the two-year siege of Thessalonica by the local Slavic tribes.source

8th century

717September 1 – A Muslim armada, consisting of 1,800 ships commanded by Admiral Suleiman, sails into the Sea of Marmara and drops anchor below the sea walls of Constantinople, to supply their forces ashore. Leo III orders the Byzantine fleet to sally forth from their protected harbors with Greek fire, setting alight the thickly-packed Muslim ships. Many vessels burst into flames, while others collide with each other before sinking.source
727A revolt breaks out in Greece against the religious policies of Emperor Leo III (see 726). A rebel fleet under Agallianos Kontoskeles sets out for Constantinople with Kosmas, an anti-emperor, but is destroyed by the Byzantine fleet through the use of Greek fire.source

9th century

822Byzantine general and usurper Thomas the Slav continues his revolt against Emperor Michael II. He unsuccessfully besieges Constantinople, while his fleet is destroyed by Michael's fleet, using Greek fire.source

10th century

919Battle of Langshan Jiang: The Wuyue navy (500 dragon ships) under Prince Qian Yuanguan who is preparing an invasion to attack the Wu Kingdom, defeats the naval forces of General Peng Yanzhang on the Yangtze River. Due to the use of flamethrower ships (using gunpowder to ignite petrol, like Greek fire) Qian Yuanguan manages to destroy 400 enemy ships and captures 7,000 prisoners.source

12th century

1190May 5 – Siege of Acre: A Crusader force under King Guy of Lusignan attacks the city with three siege engines, but all are destroyed by the Muslim defenders with Greek fire, a highly flammable liquid. An Egyptian flotilla is able to avoid the Pisan fleet (some 50 ships) and resupply the city with new provisions. Saladin launches a massive eight-day attack on the Crusaders two weeks later. Meanwhile, in the Crusader camp the conditions are deteriorating by disease and famine, among the soldiers.source

13th century

1219July 8 – Pelagius begins multiple attacks at Damietta, using Pisan and Venetian troops. Each time they are repelled by the defenders, using Greek fire. A counter-offensive led by Al-Kamil on the Templar camp is repulsed on July 31 by their new Grand Master Peire de Montagut, supported by the Teutonic Knights – where the Crusaders reform and pursue the enemy outside the gates.source