I don't own Warhammer so please don't sue me.
Hour six-Surface of Valnes III defense facility (6 hundred hours, Sol Time)
Private Jerran William ducked out of the way for the 3rd time in 30 seconds. After his squad was hit by a venom cannon needle, killing everyone in the squad except for him and private Urman Laire (who had been killed 2 minutes later by a black borer beetle) Jerran had been firing his rocket launcher at the approaching termagants and then ducking and reloading. He was in an odd position, his head lying back on a piece of the cement wall with his feet pressed against an other angular shaped piece of the wall with his rocket launcher over his chest so that he could easily reload and could fire with only sticking a small part of his body into the open. His last rocket was loaded now and he would pop up in a second and blow the remaining termagants to bits. He popped up and fired. He heard shrieks as the gaunts were hit with metal. Now to get more ammunition. He could just see his loader's pack of rockets sticking between two pieces of concrete. He climbed down the wall with his launcher over his shoulder and just managed to grab the pack. Then he slipped, not expecting the weight of the pack and fell to the bottom of the wall 10 feet bellow. A minute later he woke up to find a storm trooper bending over him. The trooper helped him up. He nodded at the stormtrooper who asked through his mask: "You okay? You fell a long ways." Jerran nodded and grabbed his rocket launcher. "What's happening?" He asked. Before the storm trooper could answer a hormagaunt darted through the gap in the wall and dogging the blasts from the hell guns tackled, him. He wrestled with the thing holding its claws back. Jerran dropped his rocket launcher, took out his heavy-duty knife and gored the thing straight through it's thick carapace and killed it. In it's thrashing it cut the storm trooper's neck killing him. Jerran re-sheathed his knife and grabbed his rocket launcher. He ran to the collapsed part of the wall and hid behind a large piece of concrete. He loaded his launcher, popped-up and came face to face with a 7-foot tall genestealer. Jerran leapt 3 feet backwards. He fired. The rocket went straight through the creatures mid section and kept going right into a pack of looming tyranid warriors blasting holes in 3 of the monster's carapaces killing two. Jerran loaded another rocket and it was then when an unseen genestealer tackled him. Jerran's rocket launcher went shooting out of his hand. He screamed as it cut him across his chest easily piercing his flak armor and gouging a deep cut in his chest. Jerran kicked it in the face with his heavy boot and he heard a crack as its neck snapped. The genestealer celled on the ground, dead. Jerran crouched and ran for his rocket launcher. He hunkered down and waited for the right opportunity to send the monsters that we storming the wall straight to the abyss.
Private Lewis Syler heard the scream of the soldier next to his to see his fellow tumble backwards of the wall after being hit by a small black beetle in the chest. He stuck his head up just a small bit and viewed the battlefield. He saw around 400 gaunts of various shapes and sizes forming the 1st 4 ranks of the advance. Farther back scattered throughout smaller creatures were lumbering carnifexes. Farther back yet were the odd towering snake like zonathropes. Lewis saw a group of reavers speeding up the ranks toward them. Suddenly strange net like object hurdled by him and latched on to two soldiers next to him. He dived and caught them before they fell. The net was sticky and wet. He cut the soldiers free with his knife and hurled the net over the wall toward the tyranids. The two soldiers got back on their feet without a word and began firing their lasguns. Lewis saw that other guardsmen were wrestling themselves out of similar nets and he saw at least 3 soldiers go tumbling of the wall. Lewis poked his head up again and saw that the reavers had moved even farther up and were storming toward the broken section of the wall. He pulled a grenade from his belt and hurled it toward them. He heard shrieks as the creature we hurled in all directions by the blast. Lewis threw another grenade and saw more chaos. Good. Syler thought. Give them what they give. Lewis suddenly saw a sight that chilled him to the bone. 5 ghostly zoanthropes were moving up to the front line. He heard more screams as men were thrown like rag dolls by the powerful psychic powers of the strange creature. 4 men next to him were blasted off his feet and sent into the rocks on the side of the cliff. The Conqueror tanks fired 2 shots into the frontline and killed 3 of the zoanthropes. A rocket suddenly wised by the gaunts now storming up to the walls and blew off a zoanthrope's thick plate on its large head. It reeled back and fell down. Private Syler aimed down the sight of his rile and gave the approaching gaunts a taste of human anger.
Mclane clicked his eyepiece magnification to the maximum and saw what he feared. 5 harridians were flying toward them. For now they were about a mile away but at 30 miles an your they would be there in minutes. He cued in the storm stromtroopers and ran down the stairs to the bunker's computer terminal. He informed the crew of the station and told them to relay this to the incoming space marines and get ready for increased fighting. He then talked to the leaders of all of the squads on the wall. He hoped that the space marines got there before it was too late.