The lights were dwindling away below-the glitter of l'Avenue Organisation des Nations Unis, the hard shine from the windows of hotels and office buildings. The sounds that floated up to me were dull, muted by the field. At an estimated five-hundred-foot altitude, I took a bearing on the blue beacon atop the control tower at Hammarskjцld Field, a mile east of the town. I opened my jets to full bore and headed for the battlefield.

Chapter Three

I hung three hundred feet above the sparsely wooded hilltop where the blue-clad Moroccans had set up their forward field HQ. I was jiggling my position controls to counter a brisk breeze, and mentally calculating the odds against my being bagged by a wild shot. With my goggles turned to low mag and IR filter, I was able to make out a cluster of officers around a chart table, three recon cars parked behind the crest of the hill with their drivers beside them, and a line of dug-in riflemen on the forward slope. Five miles to the north, the pale blue flashes of the Algerians' opening bombardment winked against the horizon.

The battle's objective was a bombed-out oasis occupying the center of the shallow valley ringed by the low hills over one of which I now hovered. According to Felix's Utter Top Secret Battle Plan, the Algerians would thrust their right forward in a feint to the Moroccan left, while quickly bringing up the bulk of their light armor behind the screen of the hills on the enemy right. The Moroccan strategy was to sit tight in defensive entrenchments until the enemy intention became clear, then launch a drive straight down the valley, with a second column poised to take the Algerians in the flank as soon as they struck from cover at the Moroccan flank. It seemed like a nice, conventional exercise, and I felt sure the boys would enjoy it a lot.

The Algerian ballistic shells were making vivid puffs high above the valley now, followed by laggard thumps of sound, as the Moroccan antiballistic artillery made their interceptions. At each flash, the details of the battlefield below blinked into momentary clarity; it was an almost steady flickering, like heat lightning on a summer evening.

I turned up my binocular magnification, scanned the distant Algerian massing area for signs of their main column moving out. They were a minute or two ahead of schedule. The churn of dust was just beginning to rise above the lead element; then antidust equipment went into operation and the cloud dissipated. Now I could pick out the tiny pinpoints of running lights, coming swiftly around in the shelter of the distant hills to form the arrowhead of the Algerian attack.

I lifted myself another hundred feet, jetted toward their route of advance. They were coming up fast-risking accidents in the dark-to beat the best time the Moroccans would have estimated was possible. I arrived over the cut through which they would turn to make their dash for the oasis, just as the lead tank rounded into it-a massive Bolo Mark II, now running without lights. The Moroccans, caught in the trap of overconfidence in their intelligence analysis, still showed no signs of recognizing the danger. The first squad of four Algerian combat units was through the pass, gunning out into the open.

Belatedly now, a volley of flares went up from the Moroccan side; the tanks had been spotted. Abruptly the valley burned dead-white under a glare like six small suns; each racing tank was the base of a cluster of long, bounding shadows of absolute black.

I dropped lower, watched the second and third elements follow the lead units through the pass. The fourth unit of the last squad, lagging far behind, slowed, came to a stop. A minute passed; then he started up, moving slowly ahead, bypassing the designated route of march.

Out on the plain, Moroccan tanks were roaring out from their positions two miles to my left, guns stabbing across the plain, both columns together in a hammerblow at the Algerian surprise thrust. Below me, the lone tank trundled heavily away from the scene of action, veering to the left now, moving into broken ground. The approved Battle Plan had included no detachment operating independently on the Algerian left; if the wandering Bolo were detected by the monitors-as it must inevitably be within minutes-the battle was forfeit, the fury and destruction all for nothing. Something was up.

I ignored the battle on the plain. I dropped to a hundred feet, followed the tank as it lumbered down a shale-littered slope into deep darkness.

I moved carefully between towering walls of shattered rock, fifty feet above the floor of the dry wadi along which the Bolo moved in a sluggish crawl. A finger of light from its turret probed uncertainly ahead as though exploring new and dangerous territory. It negotiated an awkward turn, halted. I saw a faint gleam as its hatch cycled; then a silhouetted man clambered out, dropped to the ground; the tank sat with turbines idling, its searchlight fixed aimlessly on a patch of bare rock, like the gaze of a dead man.

I turned up the sensitivity of my goggles, tried to penetrate the darkness. I couldn't see the driver. I moved closer Something massive and dark was coming up the ravine toward me, hovering two yards above the ground. It was a flattish shape, roughly oval, dull-colored, casting a faint blue-green glow against the rocky walls as it maneuvered gently around a projecting buttress, settled in close to the Bolo.

For a moment nothing more happened. The idling engine of the tank was a soft growl against stillness, punctuated by the sounds of distant battle. Then there was a heavy thud. The sound reminded me of a steer I had seen poleaxed once in a marketplace in Havana…

I worked my binocular controls, tuning well over into the IR. The scene before me took on a faint, eerie glow. I maneuvered to the right, made out an oblong path of lesser blackness against the ground.

Abruptly, shadows were sliding up the rock wall. The angry snarl of an engine sounded from behind me. I lifted quickly, moved back against the ravine face. The armored shape of a late-model command car careened into view, an opaque caterpillar of dust boiling up behind it. The blue-white lance of its headlight scoured the canyon floor, picked up the dusty side of the tank, reflecting from the rim of its open hatch. The car slowed, stopped directly below me, hovering on its air-cushion, the blue-black muzzles of its twin infinite repeaters poking through the armor-glass canopy, centered on the tank.

A minute passed; faint, flickering light stuttered against the sky in the direction of the battle. The car below sank, came to rest slightly canted on the boulder-strewn ground. Its engines died. Metal clanked as the door slid open. A man in a dull-green Algerian field uniform stepped out, a pistol in his hand. He shouted in Arabic. There was no reply.

He walked forward into the settling dust in the alley of light from the car's headlamp, his shadow stalking ahead. I saw the glint of the palm-leaf insignia on his shoulder; a major, probably the squadron commander He stopped, seemed to totter for a moment, then fell stiffly forward. He hit hard on his face, and lay without moving. I hung where I was, absolutely still, waiting.

From the darkness beyond the stalled tank, a creature came into view, padding silently on broad, dead white paws like ghastly caricatures of human hands. Stiff, coarse hair bristled on the lean, six-foot body, growing low on the forehead of a naked face like a fanged and snouted skull. A pattern of straps crisscrossed the razor back; light winked from metal fittings on the harness.

It came up to the man who lay face-down with his feet toward me, fifty feet below. It settled itself on its haunches, fumbled with its obscenely human hands in a pouch at its side. I caught a glint of light from polished instruments; then it crouched over the man, set to work.