Armorial of the Spanish Armed Forces
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.
Source: Wikipedia — Armorial of the Spanish Armed Forces (CC BY-SA 4.0)