From the Inside Flap
The Tortantulas covered the hills at the edge of First Sergeant 'Mun' Enkh's vision like a black blanket. If Mun looked hard, she could see the hillside moving, crawling with the giant spiders. She had never seen Tortantulas wait before, and it was disconcerting; normally, they threw themselves into combat recklessly and attacked at the first chance. In fact,they usually only took contracts that offered maximum carnage, which didn't bode well for the waiting Humans.
They should have charged, but they hadn't. Obviously, there was someone from another race in charge of them. Based on that observation alone, Mun suspected a Veetanho lurked somewhere in their command structure, holding their chains until the exact moment the time was right. Tactical experts, the Veetanho rarely lost; Mun knew the attack would commence at the worst possible time...for her.
The spiders continued to mill just outside the effective range of the Human mercenaries' weapons, almost daring them to waste some of the ammunition she knew they would need once the attack commenced. With that many Tortantulas, she wasn't sure there was enough ammo on the entire planet to stop their assault,much less here with her battalion. It looked like someone had taken an entire Tortantula world, emptied it, and sent them here.
She scanned behind her; the last of the noncombatants had emerged from the escape tunnel and were running as fast as they could to where the shuttles waited two miles down the ravine. As noncombatants, they were more used to sitting on their butts in the rear echelons and less accustomed to physical exertion;'running as fast as they could' was barely more than a quick walk for many of them. Her job was to hold off the spiders until the shuttles were safely away,but she could already see that was going to be like holding back the tide. This was the worst possible time for an attack.
The enemy commander must have realized it, too, for at some unseen signal, the Tortantulas moved forward as one.