Karabiga (  Karabuga ) is a town in  Biga District, Çanakkale Province, in the Marmara region of Turkey. It is located at the mouth of the Biga River, on a small east-facing bay, known as Karabiga Bay. Its ancient name was  Priapus or Priapos ( Ancient Greek: Πρίαπος).
Originally a town of
ancient Mysia, it was a colony of Miletus or of Cyzicus. It had a good harbour.  Strabo mentions that the area produced fine wine and that the god Priapus gave the town its ancient name.  Thucydides mentions the town as a naval station.  Arrian reports that in 334 BCE Alexander the Great sent Panegorus to take possession of the city and the city surrendered without contest, prior to the Battle of Granicus.  Besides the aforementioned authors, the town was noted by numerous ancient writers and geographers including  Pomponius Mela,  Pliny the Elder,  Stephanus of Byzantium, and the  Geographer of Ravenna.
Eastern Roman Empire, the town was known as Pegae or Pegai (Πηγαί) and was the site of a Byzantine fortress. 
Allied occupation following World War I, Karabiga was part of the lands that were claimed by Ahmet Anzavur in his attempt to keep the area from the Turkish nationalists. He was killed just outside Karabiga in April 1921 by Turkish nationalists aligned with Arnavud Rahman.
Karabiğa (Approved) at GEOnet Names Server, United States National Geospatial-Intelligence Agency
Karabuga (Variant) at GEOnet Names Server, United States National Geospatial-Intelligence Agency
Karabiğa Limanı (Approved) at GEOnet Names Server, United States National Geospatial-Intelligence Agency
Priapus (Variant) at GEOnet Names Server, United States National Geospatial-Intelligence Agency
One or more of the preceding sentences incorporates text from a publication now in the public domain: Smith, William, ed. (1854–1857). "Priapus". . London: John Murray. Dictionary of Greek and Roman Geography
^ a b
Strabo. . xiii. p. 587. Geographica Page numbers refer to those of Isaac Casaubon's edition.
Thucydides. . 8.107. History of the Peloponnesian War
Arrian I, 13 Campaigns of Alexander
Pomponius Mela. De situ orbis. 1.19.
Pliny. . 4.24, 5.40. Naturalis Historia
Stephanus of Byzantium. Ethnica . s.v. Πρίαπος.
2.18. Ravenna Cosmography
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The Middle Sea: A History of the Mediterranean Doubleday, New York, page 103, ISBN 978-0-385-51023-3
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A History of the Crusades: The Impact of the Crusades on Europe University of Wisconsin Press, Madison, Wisconsin, page 241, ISBN 978-0-299-10744-4
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Sorrowful Shores: Violence, ethnicity, and the end of the Ottoman Empire, 1912-1923 Oxford University Press, Oxford, England, pages 106 and 118, ISBN 978-0-19-956152-0