The Pilgrims were a group of English people who came to America seeking religious freedom during the reign of King James I. After two attempts to leave England and move to Holland, a Separatist group was finally relocated to Amsterdam where they stayed for about one year. From there the group moved to the town of Leiden, Holland, where they remained for about ten years, able to worship as they wished under lenient Dutch law.
Fearing their children were losing their English heritage and religious beliefs, the resumption of war and their inability as non-citizens to find decent jobs, a small group from the Leiden church made plans to settle in Northern Virginia - as New England was known at the time. In August 1620 the group sailed for Southampton, England, where other English colonists who hoped to make a new life in America met them.
https://www.themayflowersociety.org/the-pilgrims/pilgrim-history