The Scarlet Citadel by Robert E. Howard

The midafternoon sun glinted on the placid waters of the Tybor, washing the southern bastions of Shamar. The haggard defenders knew that few of them would see that sun rise again. The pavilions of the besiegers dotted the plain. The people of Shamar had not been able successfully to dispute the crossing of the river, outnumbered as they were. Barges, chained together, made a bridge over which the invader poured his hordes. Strabonus had not dared march on into Aquilonia with Shamar, unsubdued, at his back. He had sent his light riders, his spahis, inland to ravage the country, and had reared up his siege engines in the plain. He had anchored a flotilla of boats, furnished him by Amalrus, in the middle of the stream, over against the river wall. Some of these boats had been sunk by stones from the city's ballistas, which crashed through their decks and ripped out their planking, but the rest held their places and from their bows and mastheads, protected by mandets, archers raked the riverward turrets. These were Shemites, born with bows in their hands, not to be matched by Aquilonian archers.

On the landward side mangonels rained boulders and tree trunks among the defenders, shattering through roofs and crushing humans like beetles; rams pounded incessantly at the stones; sappers burrowed like moles in the earth, sinking their mines beneath the towers. The moat had been dammed at the upper end, and emptied of its water, had been filled up with boulders, earth and dead horses and men. Under the walls the mailed figures swarmed, battering at the gates, rearing up scaling ladders, pushing storming towers, thronged with spearmen, against the turrets.