"In military organizations, the practice of carrying colours, standards or guidons, both to act as a rallying point for troops and to mark the location of ...
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the commander, is thought to have originated in Ancient Egypt some 5,000 years ago. The Roman Empire also made battle standards a part of their vast armies. It was formalized in the armies of Europe in the High Middle Ages, with standards being emblazoned with the commander´s coat of arms." - (en.wikipedia.org 09.01.2021)