The red cross of St. George was a symbol of Christian martyrdom since its first use during the Crusades .
The flag was used by horsemen and colonial foot soldiers and consisted of a red St. George 's Cross on a white field .
The red cross of St. George 's Cross   was a symbol of Christian martyrdom since its first use during the Crusades .
The flag was used by horsemen and colonial foot soldiers and consisted of a red St. George 's Cross on a white field .