Sark, with the neighbouring islands of Herm, Alderney, Guernsey and Jethou, constitutes the administrative bailiwick/district of Guernsey, an autonomous and by the British crown-adminstrated territory
The flag of the Isle of Sark combines the flag of England (the red St. George's cross on white background) with the flag resp. the coat of arms of Normandy in the upper left staff quadrant. This consists of two golden, striding and sideways looking lions (better leopards) on red ground.
1066 · William I. (Duke of the Normandy) gets crowned to the King of England, therewith come the Channel Islands nominally to the English crown
1106 · King Henry I. of England (son of William I.) occupies the Channel Islands, separates them therewith from the Duchy of Normandy, and binds them on England
1553 · Adrian Crole conquers the island for Emperor Karl (Charles) V. (Emperor of the German Empire)
1565 · Sark becomes a fiefdom of the English crown