current world. reporter: here s what really happened in 1621. both pilgrims and natives were in trouble. each side needed the other. they made an alliance. there was sickness. there was fighting. it had taken place. it was a roll of the dice, but you needed to survive. reporter: steven peters and his mother, paula said their an ses or thes how to use the land. it was a to say the friendly indians taught the pilgrims how to hunt and fish and survive and would have otherwise perished is true, but the treatment of the tribe both before and after is another truth that doesn t get told. reporter: over the last 400 years the tribe lost more than 99% of their land colonized by the one-time newcomers.