What did they eat at the first Thanksgiving in 1621? Likely not turkey. Here's the history
When the Pilgrims first celebrated Thanksgiving in 1621, their feast did not have turkey. Pilgrim chronicler Edward Winslow recorded that they ate some type of wild foul and deer brought by the Mashpee Wampanoag, who joined the feast after they heard musket shots and approached the Pilgrim settlement to defend themselves.