The Life of Constantine with Orations of Constantine and Eusebius 219He orders the Sign of the Saviour's Cross to be engraven on his Soldiers' Shields.
Open in the readerAnd not only so, but he also caused the sign of the salutary trophy to be impressed on the very shields of his soldiers; and commanded that his embattled forces should be preceded in their march, not by golden images, as heretofore, but only by the standard of the cross.