As we have seen, Headquarters Flags (and related), were used by Military Commanders to identify their Headquarters. They were also sometimes referred to as "Personal Colors". Gen. George Washington was Commander of The American Continental Army during it's Revolution against Great Britain. In the Winter of 1776-77, he adopted a Headquarters Flag for his use. Described as a Blue Field populated by 13 6-sided Pinfoil Stars, it was this flag seen during the harsh Winter at Valley Forge, Pennsylvania. The initial Flag would not cease use after the War it would seem. The design (with more traditional Stars - and many more for that matter), was incorporated into The US Navy's Ensign during The American Civil War (1861-1865). In the 20th Century, the Flag would be used to identify the official Yacht of The President (when one was used).