Dashavatara (Sanskrit: दशावतार, daśāvatāra) refers to the ten avatars of Vishnu, the Hindu god of preservation. Vishnu is said to descend in form of an avatar to restore cosmic order. These Avatars play a major role in shaping human evolution through centuries.
The list of 10 incarnations of Lord Vishnu is Matsya, Kurma, Varaha, Narasimha, Vamana, Parashurama, Rama, Krishna, Buddha, and Kalki. Sometimes, Krishna replaces Vishnu as the source of all avatars.
The first four avatars of Vishnu appeared in Satya or Krita Yuga, the first of the four Yugas, also called ‘The Golden Age’, the next three in the second Yuga, the Treta Yuga, the two avatars after that appeared in the third Yuga, the Dwapara Yuga and tenth and last avatar will appear in the last Yuga, Kali Yuga.
The time till completion for Kali Yuga is in 427,000 years. In the Vishnu Purana and the Bhagavata Purana, the Kali-yuga is described as ending with the appearance of Kalki, who will defeat the wicked, liberate the virtuous, and initiate a new Satya or Kalki Yuga.