What was a factor in Pilgrim's success in their new colony?

An agreement with local native Americans.

Explanation:

The Mayflower Pilgrims were the first settlers to settle on the land of what would be the future United States of America. They went through many difficulties because of the harsh winter they faced when they arrived in America, many of them died. Those who survived established good relations and peace agreements with local Native Americans and this allowed them to succeed in the new colony

I believe them gaining more food sources was a factor