"A herald, or a herald of arms, is an officer of arms, ranking between pursuivant and king of arms. The title is commonly applied more broadly ...
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to all officers of arms.
Heralds were originally messengers sent by monarchs or noblemen to convey messages or proclamations—in this sense being the predecessors of modern diplomats. In the Hundred Years´ War, French heralds challenged King Henry V to fight. During the Battle of Agincourt, the English herald and the French herald, Montjoie, watched the battle together from a nearby hill; both agreed that the English were the victors, and Montjoie provided King Henry V, who thus earned the right to name the battle, with the name of the nearby castle." - (en.wikipedia.org 07.12.2019)