Spanish military units have coats of arms, badges and emblems to distinguish them from other units both joint Armed Forces and service branches units. The first evidence of medieval coats of arms is found in the Bayeux Tapestry from the 11th century, where some of the combatants carry shields painted with crosses. Coats of arms came into general use by feudal lords and knights in battle in the 12th century. By the 13th century arms had spread beyond their initial battlefield use to become a kind of flag or logo for families in the higher social classes of Europe. The use of arms spread to Church clergy, and to towns as civic identifiers, and to royally-chartered organizations such as universities and trading companies. In the 21st century, coats of arms are still in use by a variety of ins