Grand Union Flag - First National Flag of the Continental Army #1852517 (License: Personal Use)

This historical flag, also known as the Continental Colors or Cambridge Flag, was first raised by General George Washington on January 1, 1776, at Prospect Hill. It combined the British Union Jack in the upper-left canton with thirteen alternating red and white stripes symbolizing the Thirteen Colonies. Though short-lived, it marked a pivotal moment before the adoption of the Stars and Stripes.

Used on history, military heritage, and U.S. independence websites; ideal for articles about early American symbolism, Revolutionary War artifacts, or flag evolution. Matches user intent seeking educational content on pre-1777 U.S. flags.