((Retconing last post so to trow the Imperial Voices at their actual drop points.))
Imperial Voices
The chapter master knowing that the threat is urgent and in need of remedies agrees to do all he can immediately. The Governor smiles and thanks him profusely for his help as expected of a man receiving the help of the Emperors most powerful warriors in his planets time of need. Within the hour drop pods land on both sites as well as other objectives set up to scout and disrupt the Ork's forces.
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Objective 1 - Material Caravan
A PDF officer speaks to a Imperial Guard officer...
"Colonel we are done putting all materials in the caravan, as per instruction. We are ready to move out now.". The Colonel looking worried nods his head and is about to vox in orders to move out, obviously not wanting to be caught in a fight with the Greenskins out in the open. Emperor knows that the axes that have taken so many of his comrades and cadre will cut through him just the same if given the chance. Suddenly hundreds of Imperial Voices drop pods fall from the sky with 180 space marines stepping out guns at the ready.
The PDF are ecstatic at the arrival cheering the Emperors name and taking their hats off in honor of their new allies. The IG Colonel voxes in through his channel "Gentleman lets return to base with these materials and with the protection from the Emperor. Today marks a new point in the conflict." He voxes out.
Some 30 miles from the front line though the Orks are spotted moving in 5 different mob bikes towards your caravan. The Colonel voxes to continue the caravan nonetheless but ordering his men to ready for a fight. He clearly has gained much confidence with the arrival of your chapter. Will his hopes be crushed?Enemy: 200 Orks riding Ork-Bikes.
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Objective 2 - Defending the lines
Hundreds of other drop pods continuously drop not too far of its brethern. They land harmoniusly somewhat behind lines of Imperigal Guardsmen, PDF, and militia unitis guarding a long trench with few bunkers between. The choirs rollout almost immieditely to cover up the gaps and intercept Ork probing assaults of mostly shootas. The voices have an overweliming majority over these dysfunctional small mobs and roast them in the Emperors light. Bolters crack skulls and flames from promethium liquids crawl up Ork bodies as Sisters of Battle from a nearby abbey support their newest ally to defend Klauze III.-------
Objective 3 - Infiltration/Scouting mission
Drop pods continue to drop but possibly the most important skirmish is to be had when the drop pods of the fourth and fifth choir touchdown on a plain of ruined human corpses and an abandoned factory district. The Choirs mobilize squads checking the builidngs one by one and killing off Ork straglers and gretchins. Inside they see Leman Russ battle tanks pained red presumaably using the bodies of the fallen soldiers. Large barrels of "paintzes" are filled with blood and bile scattering around some of the main assembly lines.
A gretchin is seen running inside the bathroom yelling "VWEL GETZ JOU FOR DIS!"
as it scampered inside a huge tunnel inside the middle of the floor. The tunnel inside looks very large but squads are asking permision before entering a potential Xeno's hive.
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((Decisions needed for Choirs fourth and fifth on whether to pursue the Gretchin, destroy the facilities (denying Orks their Tank lootage), and or leaving it alone for re-captrue. Remember their behind the enemies lines and advancing is currently out of the picture due to lack of numbers.
Also we need orders for the First, Second, Eleventh, and Twelfth Choirs who are fighting alongside remants of the PDF/IG caravan. (Also behind enemy lines)
Sending out forces from the front to help either squad is possible but they will most likely be seen and engaged. For all intents and purposes their mostly on their own unless the dice gods are with you. No dice rolling just yet btw.))
Imperial Voices: 100% with 1000/1000 troops deployed. (Not counting the Sisters)
IG: Unknown numbers. Reinforcements in 3 weeks (3 Turns).
PDF: ~10%
Orks: ~Large?
Below are your Choirs and specializations. All vehiculars are on the ships or with squads 11 and 12.
Choirs 1-3, Drop Assault and Rapid Response: Blitzkrieg maneuvers and that which the Astartes are infamous for, these marines prefer drop pods, bikes, and jump packs to heavy weapons and oversized vehicles.
Choirs 4-5, Reconnaissance and Guerrilla Warfare; Often making use of the Voiceless, these marines know it takes skill to sing softly.
Choirs 6-7, Siege Warfare and Urban Assault: Patience and preparation are the byword of these Choirs, whose marines are proficient at making, breaking, and finishing sieges, as well as the intensities and risks associated with fighting in crowded environments, whether they be Imperial hive or Xenos nest.
Choirs 8-10, Line Support and Endurance Warfare: the Marines may be the Emperor's scalpel, but the Guard are his sledge, and the so-called 'Commissar Choirs' ensure the sledgehammer hits as hard as possible, every time, in the right place. Thankfully they are not so hard on their lesser comrades as the moniker may imply...
Choir 11-12, Armored Warfare and Mechanized Assault: More technically oriented than most Choirs, these Space Marines may not perform acapella, but the Orchestra at full blast is a glory of it's own. They excel at fighting both alongside and against vehicles, even if the meltas are left for the Sisters.
Choirs 13-14, Naval Warfare and CQC: Every Chapter needs Marines trained to deal with boarding ships. Choir 13 in particular is specialized in boarding and clearing Space Hulks.
Choirs 15-16, Generalists: Sometimes, the most important thing to specialize in is nothing at all, but as a result, compared to the other Choirs, these Marines really like their flyboys, whether they're clearing the skies, strafing the ground, or simply evacuating Astartes from a battlefield once the objective's been completed.