The Wampanoag did not greet the Pilgrims
Did any "Wampanoag" greet the first arrivals at Plymouth? No. No Indians did. What William Bradford and those other first arrivals found were deserted Indian villages, the victims of smallpox epidemic that had spread south from Newfoundland. Were there "Wampanoag" in the region? Yes. The boundary between the Pokanoket and Massachusett tribal lands was in this area. Were these "Wampanoag" members of the Mashpee tribe? No.
Why weren't the Mashpee there? Simply put, there was not a Mashpee tribe in existence at the time of historical contact (1620) in Massachusetts. Mashpee, as a self-governing distinct Indian community or enclave having its own defined territory, did not come into existence until 1665, some 45 years after the point of first sustained Indian contact with non-Indians in this region. Mashpee was a product of the collision between two cultures, English and Indian. Mashpee is not what is commonly called an "historic or historical tribe" that is, a politically organized tribe, having its own defined territory that was in existence at the time of first sustained contact with the colonists. Mashpee was the produce of tribal disintegration and fissioning as a result of this bi-cultural collision.
"Historically there was never a Wampanoag Tribe".
This statement shows an utter and complete lack of understanding between 'Nation' and 'tribe'. The map shown of 'sub-tribes' further underscores a lack of research on your part. Wampanoag is a NATION not a tribe. There is a difference. There were originally 69 tribes within the Wampanoag Nation. ... The Wampanoag Nation territory during the 17th century was bounded by: current day Cape Anne to the North; Southwest to current day Dudley; Southeast to the Blackstone River in East Providence; South to Narragansett Bay. That is the Nation. Mashpee is but one tribe.