Ares is the Greek GOD of WAR, and is often associated with MARS, the Roman GOD of WAR. Eris is the Greek goddess of strife and discord, and is the sister of Ares. WAR is an armed conflict between two or more parties, and WARFARE is the use of military forces to achieve political objectives. GOD is a supernatural being, and GODS are the deities of polytheistic religions. Xena is a fictional warrior princess from the television series of the same name, and HERA is the Greek goddess of marriage and queen of the GODS.