Wiktionary
warhorn
n. (alternative form of war-horn English)
Usage examples of "warhorn".
You were always like that before a battle: a bit nervous unless you had drunk at least a gallon of beer, and had to be strapped to the saddle by the time the warhorns sounded.
Beneath the dragonglass was an old warhorn, made from an auroch's horn and banded in bronze.
The Therms carried bronze-banded warhorns to give warning should the Watch be sighted.