The Hour of the Dragon by Robert E. Howard

CONFIRMATION OF THE war came when the army of Poitain, ten thousand strong, marched through the southern passes with waving banners and shimmer of steel. And at their head, the spies swore, rode a giant figure in black armor, with the royal lion of Aquilonia worked in gold upon the breast of his rich silken surcoat. Conan lived! The king lived! There was no doubt of it in men's minds now, whether friend or foe.

With the news of the invasion from the south there also came word, brought by hard-riding couriers, that a host of Gundermen was moving southward, reinforced by the barons of the northwest and the northern Bossonians. Tarascus marched with thirty-one thousand men to Galparan, on the river Shirki, which the Gundermen must cross to strike at the towns still held by the Nemedians. The Shirki was a swift, turbulent river rushing south-westward through rocky gorges and canyons, and there were few places where an army could cross at that time of the year, when the stream was almost bank-full with the melting of the snows. All the country east of the Shirki was in the hands of the Nemedians, and it was logical to assume that the Gundermen would attempt to cross either at Galparan, or at Tanasul, which lay to the south of Galparan. Reinforcements were daily expected from Nemedia, until word came that the king of Ophir was making hostile demonstrations on Nemedia's southern border, and to spare any more troops would be to expose Nemedia to the risk of an invasion from the south.