The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The alliance between Ousamequin's people and the Pilgrims helped each other group to establish a peace agreement that lasted fifty years in which both sides established commitments to cooperate in everything they could to live in prosperity.
On April 1, 1621, Pilgrims that founded the Plymouth colony in Massachusetts, signed this treaty with Chief Massasoit, the leader of the most important Native American Indian tribe in the region. the Wampanoags. Historians document this agreement as to the first between white Europeans and Native American Indians.