what was her role in this war?
Paris had to give his decision on who was the fairest amongst Aphrodite, Hera and Athena. Since he selected Aphrodite, the other two goddesses were enraged and, as a direct result, sided with the Greeks in the war.
Athena
The myth of the Judgement of Paris is mentioned briefly in the "Iliad", but is described in depth in an epitome of the "Cypria", a lost poem of the Epic Cycle, which records that all the gods and goddesses as well as various mortals were invited to the marriage of Peleus and Thetis (the eventual parents of Achilles). Only Eris, goddess of discord, was not invited. She was annoyed at this, so she arrived with a golden apple inscribed with the word καλλίστῃ (kallistēi, "for the fairest"), which she threw among the goddesses. Aphrodite, Hera, and Athena all claimed to be the fairest, and thus the rightful owner of the apple.

The goddesses chose to place the matter before Zeus, who, not wanting to favor one of the goddesses, put the choice into the hands of Paris, a Trojan prince. After bathing in the spring of Mount Ida where Troy was situated, the goddesses appeared before Paris for his decision. In the extant ancient depictions of the Judgement of Paris, Aphrodite is only occasionally 
where did the first olympic games take place It was held in Athens, Greece, from 6 to 15 April 1896. what are some of the locations it took place? "Panathenaic Stadium", "The City of Marathon” “The Bay of Zea", “Kallithea” and "Athens Lawn Tennis Club” were some of them. where is this first mentioned place located? Athens, Greece. what is the historical account behind this stadium? Originally, since the 6th century BC, a racecourse existed at the site of the stadium. It hosted the Panathenaic Games, a religious and athletic festival celebrated every 4 years in honour of the goddess Athena. where is the origin of this aforesaid goddess? She was the palace goddess of "Aegean". where did her name originate from? The name is likely of Pre-Greek origin because it contains the presumably Pre-Greek morpheme "*-ān-". where was she born? UNANSWERABLE was she part of any war? Yes, the "Trojan War".
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Athena [SEP] Trojan War
The myth of the Judgement of Paris is mentioned briefly in the "Iliad", but is described in depth in an epitome of the "Cypria", a lost poem of the Epic Cycle, which records that all the gods and goddesses as well as various mortals were invited to the marriage of Peleus and Thetis (the eventual parents of Achilles). Only Eris, goddess of discord, was not invited. She was annoyed at this, so she arrived with a golden apple inscribed with the word καλλίστῃ (kallistēi, "for the fairest"), which she threw among the goddesses. Aphrodite, Hera, and Athena all claimed to be the fairest, and thus the rightful owner of the apple.