As suggested by SJ, a prequel to ‘Out on the Wire’:
OUT ON THE WIRE (prequel) It was hot, green and hot. God, I hate this war, Kellar thought. Sweat lubricated his fatigues. The navigator hailed him. "The drop zone's two clicks, Captain. We can just make it." "Take the locals ahead, Jefferson. We'll cover you." The gooks were out there, somewhere, behind, maybe even ahead. They yomped the distance in silence, eyes alert, fingers trigger-light. The foliage thinned; a gunship nestled in the clearing but Kellar noticed the blades were already turning. A figure ran towards him. "We have to leave them, sir, We're over capacity as it is." O'Brien dared Kellar's gaze. "Afterall, they are expendable."