The Choke at Oued-Ziz

An army does not dissolve by degrees; it liquefies when eighty thousand men strike a river narrower than their fear.

By noon of the second day, the gorge of Oued-Ziz smelled like wet sheepskin, sulfur, and churned river silt. From the south rim where the scrub gave way to red sandstone cliffs, the river looked like an open gutter cutting through the desert. Down on the approach, three miles of supply wagons, mule trains, and infantry battalions had jammed into a single funnel of packed earth eighty yards wide.

Ahead of us, the brown water ran thigh-deep over slate ledges. A shattered six-horse grain wagon lay capsized dead center in the ford, its splintered axle projecting like a broken rib. Around it, at least four thousand conscripts were wading in a blind press, thrashing against current that smelled of mountain snow and dead horses. Every sixty seconds, a hollow rumble rolled off the northern bluffs, followed five seconds later by the wet crump of an explosive mortar shell dropping into the shallows.

"Keep the traces taut, you sons of goats!" Captain Larbi-ani shouted from his saddle. His copper frogging was crusted with chalk sweat, his saber already drawn, the flat of the blade striking the packs of passing foot soldiers. "Make way for the ordnance! Make way or I'll run the wheels over your spurs!"

Nobody listened. Line infantry from the 12th Conscript Brigade pressed against our draught team, their eyes glazed with heatstroke and terror. A sergeant whose tunic lacked half its buttons lunged for the bridle of our near wheeler, knife glinting in his fist.

"Cut the harness!" he screamed to three men behind him. "Take the horses! The guns are dead iron—"

Gunner Mourad-bara did not argue. He stepped down from the limber box, swung his heavy ash-wood rammer two-handed, and planted the iron-shod shoe squarely into the sergeant's breastplate. The man went down into the mud without a sound, gasping like a stranded carp. Mourad leveled the copper-banded rammer at the others, his face black with kiln soot and sweat.

"Touch a buckle," Mourad rasped, "and I'll swab your throats with ditch water."

The three conscripts stumbled backward into the surge of men.

I sat the off-side horse, the sniper's octagonal rifled musket slung across my shoulder blades, my chest haversack clasped tight against my ribs. Inside that haversack lay my primary split-glass quadrant, a brass plumb-bob, and Colonel Smail-bara's blue-wax dispatch slip. The dead marksman's blue provost seal was hidden in Mourad's pouch. We were three hours past the lime kiln, eighty miles from our winter depot, and every minute in this gorge brought us closer to a mortar pit we could not see.

"Pointer!" Larbi-ani hauled his mount alongside Gun Three. "The center channel is clogged. If that twelve-pounder drops an axle in the deep mud, we lose the carriage."

"The center channel is six feet of quick-silt," I shouted over the din of screaming men and splashing water. "Look at the reeds near the western sandbar. The water breaks over stone there. There is a submerged gravel shelf three paces wide that cuts obliquely toward the spit."

"How deep?"

"Two feet four inches. Hard limestone bottom. The carriage can cross if the draught team doesn't bolt."

Another dull roar rumbled across the north ridge. I counted the intervals under my breath: one, two, three, four.

The whistle was shrill, descending at seventy degrees. Fifty yards downriver, a mortar round struck the water beside a stalled baggage cart. A geyser of muddy foam erupted twenty cubits into the air, throwing two screaming infantrymen against the stony bank. Shrapnel hummed like hornets through the hot air, slicing willow scrub into green confetti.

"Interval is seventy-four seconds," I said, checking the angle of the rising plume against the sandstone bluff. "The batteries are elevated behind the northern palisade. High-angle trajectory. They are firing blind over the rim."

"They aren't blind," Larbi-ani spat, squinting across the river. "They've dropped six rounds on the ford since we crested the ridge. Every shot is walking five paces closer to the crossing."

"Then they have eyes on the rim," I said.

Larbi-ani slashed his saber down toward the water. "Drive! Get that carriage on your gravel shelf, Belkacem, or we die in the ditch!"

Mourad seized the lead harness, hauling the four heavy bays toward the western sandbar. The wheels of Gun Three creaked, bronze axles screaming against their grease cups as twelve hundred pounds of cast gunmetal plunged into the churned brown current.

Water hit my stirrups, cold and heavy with red grit. The draught team snorted in panic, their iron shoes slipping on the riverbed, but under their hooves lay the firm crunch of packed river gravel. Behind us, Caisson Three followed in our track, its iron-plated ammunition chests rattling like dry bones. Men threw themselves against the carriage flanks, trying to climb onto the trail-transom to escape the current. Mourad shoved them off with the butt of his rammer, unyielding as a wooden revetment.

We were fifty yards out, halfway to the mid-river gravel spit, when the seventy-four-second count expired.

The air tore open. A mortar round slammed into the water forty paces upstream. The pressure wave shoved the near-side wheeler sideways, nearly pitching me from my saddle. Spray washed over my face, hot and stinging with burnt sulfur.

"Larbi-ani!" I yelled, wiping silt from my eyelashes.

Through the drifting cordite fog, I unhooked my brass spotting glass from its leather pouch and trained it on the northern cliff rim. The sandstone wall rose two hundred yards above the flood plain, barren, sheer, and baked white by the noon sun. No gun could sit on that ledge; the recoil would heave barrel and carriage into the abyss.

Then I caught the glint.

It was not the brass sheen of a standard naval telescope or the dull gray of a field musket. It was a rhythmic, pulsing flare of violet and emerald light perched on the highest crest of the red bluff.

Two men in green coats knelt on a flat limestone shelf above the drop. Between them sat a bronze tripod mounting a polished, twelve-inch tourmaline reflection mirror. Every time the northern mortars fired from behind the ridge, the glass plate tilted, refracting sunlight in tight, geometric flashes toward the canyon below.

They were not merely spotting the ford. They were using optical alignment stakes to guide the trajectory vectors of their siege howitzers over the blind granite crest.

"Tourmaline mirror at eleven o'clock," I called out, pulling my horse toward the dry gravel of the central spit. "Northern crest. Elevation thirty-two degrees, azimuth three-forty. They aren't guessing. They're deflection-spotting our exact wheel tracks."

Larbi-ani brought his horse splashing onto the gravel beside me, his mouth set in a hard, gray line. "Can Gun Three reach that ledge with canister?"

"Canister spreads at sixty yards; the ledge is four hundred yards out at extreme elevation," I said, sliding from my saddle as the carriage wheels bit into dry stone. "Direct fire cannot climb that cliff face. The only way to silence those spotters is high-angle deflection behind the bluff."

"Our deflection stake is fractured," Larbi-ani hissed, leaning down from his saddle. "You told me eight rounds would shatter it."

"It took eight rounds at Wadi-Malik," I said. "A ninth might hold, or it might turn into sixty pieces of glass through our lungs."

Across the brown rapids, on the north bank, a fresh fountain of mud and shattered timber blew skyward. The next mortar shell had landed fifteen paces closer to the gravel spit. The walking barrage had found our range, and on the cliff rim above, the violet mirror flared once, twice, locking its vector onto our carriage wheels.