Dusshera celebration marks the victory of lord Rama over the demon king Ravana. It commemorates the triumph of good over evil. Lord Rama is believed to be the seventh avatar of the lord Vishnu.
Rama, the eldest son of King Dasharatha, ruler of Ayodhya Kingdom, had to give up his claim to the throne and embarked on a 14-year exile in the forest. His brother Lakshmana and wife Sita joined him. Sita is considered as an incarnation of goddess Lakshmi. While in exile, Sita was kidnapped by Ravana, the king of Lanka.
The events related to the kidnapping of Sita by the demon king Ravana led to a prolonged war between the two. In order to regain his wife from the clutches of Ravana, Rama waged a war against him with the help of the monkey army led by Hanuman.
According to the legend, Rama worshipped the nine aspects of Goddess Durga for nine days. He considered it inevitable to gather the strength and power to kill Ravana. Rama had performed “Chandi Homa” and invoked the blessings of Durga. The goddess blessed Rama with secret knowledge of the way to kill Ravana.
On the tenth day, Rama killed Ravana with the blessings and power of goddess Durga. Dusshera symbolises this victory of Rama over Ravana.