Yes, about 5000 years ago. There are several places referred in Mahabharata exist even today. However there would not be much "hard" evidence to "prove" it. A large group of people " believe" it happened.
yes
The Mahabharata is believed to have taken place around 3100 BCE, which was about 5,000 years ago.
The original name of the Mahabharata is Mahabharata.
There are number of heroic things that Arjuna do in Mahabharata. The list is long and beyond the scope. Better you read the Mahabharata. Rather study the Mahabharata.
Yes, Mahabharata is a true story.
One highly recommended Mahabharata translation is "The Mahabharata: A Modern Rendering" by Ramesh Menon.
Ajaamila is personality who comes in Srimadbhagavata, not in Mahabharata
It was Bhimsen who killed Jarasandha in Mahabharata.
The gambling game is what Mahabharata is famous about.
The Mahabharata was narrated by Veda Vyasa, and Lord Ganesha (an elephant-headed deity) wrote it.
Because mahabharata includes in religios discussions
Lord Ganesha wrote Mahabharata and Ved Vyas dictated it.