Answer: 1621
Step-by-step explanation:
Most of the seeds that the settlers had come with to the colonies from England had failed to grow and so there were in danger of food shortage. Squanto who was a native who had been captured and taken to England at some point in his life, showed them how to fertilize crops by using fish.
This was in the year 1621 after the settlers had just signed a peace treaty with Chief Massasoit of the Massachusetts Indians. The help that Squanto provided them was immeasurable and this much was attested to by the Governor of Plymouth Colony, William Bradford.