Presentation:
From the East to the West, from Shintoism to Greek mythology, gods of war are present. "Black princes" dedicating their lives to the art of fighting, they were sometimes seen as violent and cruel, but always as effective protectors. In Asia, many satues of these gods guard the doors of Temple, to prevent the Evil to enter...

My research:
A quick search on the net gives almost 70 names associated to gods of war, including:
Ab Kin Xoc / Ppiz Hiu Tec (Maya god of war & poetry), Adonaï Tsevaot ("god of war" in the Bible), Ah Hulneb, Ahayuta Achi, Alaisiagae, Anat (Anath, Anthat), Andraste (Andrasta, Adraste), Anhur (Anhert, Anhuret, Greek Onuris), Apedemak, Aphrodite (Greek mythology), Aray (Ara), Ares (Greek mythology), Arinna (Ariniddu, Arinnitti?), Ashur, Athena (Athene -- Greek mythology), 'Attar, Badb (The Badb, Bodb), Banba (Banbha), Beg-tse (Cam-srin), Belatucadros, Bellona (Duellona), Bhima, Bishamon (Bisham), Bo, Bugid Y Aiba, Buluc Chabtan, Burijas (Burijash, Buriyas), Camulos, Cariociecus, Caswallawn, Cathubodua, Chang Fei (China), Chemosh, Chih-Yu (China), Deimos, Diomedes, Dolichenus, Enyalius, Enyo, Gu (Gou), Guan Di (Kuan Ti, also known as GuanGong, GuanYu -- China, Taoism), GuanPing (oldest son of GuanDi -- China), Gwydion (Gwydyon), Hachiman (Shintoism), Hadur, Hadur, Honos (Honus), Huitzilopochtli (dieu aztec), Inanna (Inini; Akkadian Ishtar), Indra, Jamm, Jarovit (Gerovitus), Karttikeya (Kartikeya), Kibuka, Krishna (Krsna, Krisna), Kuan Yu, Kukalikimoku, Laran, Macha, Mars (Roman mythology) (Marspiter, Mamers, Marmar, Mavors), Gallic, Medb (Medhbh), Minerva, Montu (Mont, Mentu, Menthu; Greek Month), Mukasa, Murukan, Odin (Othinn, Woden, Wotan), Ogoun, Ogun (Ogoun), Oro (Tahitian god of war, with his son Hoa-Tapu), Teutatès (French historical god of war), Thor (North Europe's warrior & god of courage), Tyr (North Europe's god of war), Yo Fei, Yueh Fei (China, sacraliazed general), Zhou Cang (disciple of GuanYu specialized in marine -- China) etc.

If you know other gods of war, thank you for letting me know.
In particular, I'm looking for the following informations:
any god of war (or assimilated legend) from Korea,
celtic god of war,
gods of war in Islam.