Grand Union Flag (1776) - First National Flag of the United States #1820671 (License: Personal Use)

This flag, also known as the Continental Colors or Cambridge Flag, was first raised by George Washington on January 1, 1776, at Prospect Hill. It symbolized unity among the Thirteen Colonies while retaining the Union Jack to signal loyalty to the Crown before full independence was declared. Its design directly influenced the later Stars and Stripes.

Used in historical articles, museum exhibits, and educational resources about the American Revolution; targets users researching early U.S. symbolism, flag evolution, or colonial military history.