Constantine the Great painted the Greek letters khi and rho, the first two letters of the title “Christ ” in Greek, on his soldiers ’ shields in hopes of protecting his soldiers in battle.
स्वीडन के राजा गस्ताव अडॉल्फ द्वितीय ने यूरोप में तीस साल तक युद्ध लड़ा था ।