From where is the cross design on the flag of England derived?

The red cross flag used to symbolize England is derived from St. George's Cross and is thought to have come into use during the Crusades of the Middle Ages, in which several English kings fought, including Richard I, also called Richard the Lionheart, and his father, Henry II.

Asked by Pamela Mooman · Last updated 5 years ago · 6.7K views · SOURCE