Things happened after kurukshetra war: 1. After winning war,pandavas ruled Hastinapur for 36 long years.

1. Due to gandhari curse to krishna, Krishna:s yadav kingdom was fully destroyed and sunked into sea.

   
   




2. Bhagwan Krishna left his mortal body, accidentally hunt via tribesmen.

   
   




3. pandavas with Draupadi decide to climb himalaya,to the path of Heaven,

   
   

firslty draupadi and the four of pandavas died in path beacause of thier desires and pride, except Yudhister.

After that the Kaliyug begin,which is the world we know today. thank you.