Hexis: Estimated current forces

The Alliance

• alliance council
• General Kuwalski of the Federacy 
• 1 hunter cadre of Malkaor 
• 4 regiments Librian Guard (colonel Robert Bowman)
• 1 division Tallaxian engineers 
• 2 squadrons Federal Air Force 
• 1 battalion Hartak Mountain rangers 
• Sisters of Quartz 
• Kel Sandros Eldar units

Overall ground forces: 50,000 troops 

• Federal fleet - Fleet Admiral Josselin Eberhardt

Forces of the Chaos pact

• Warsmith Stahl
• Garzoth the Immovable of the Death Guard 1st Grand Company
• Several war bands Alpha Legion
• Several war bands Black Legion 
• Iron Warriors squad Horozhka 
• Iron warriors legion Stahl
• Emerald Serpent warbands 
• 5 regiments darrantine Guard 
• 3 lances heretic knights 
• Various cultist warbands and daemons 
• 50,000-100,000 orks various clans 

Overall ground forces: approx 500,000 troops 

• several pirate fleets and traitor astartes vessels 

Forces of the Imperium

• Imperial HQ. General Konev
• Demi company Howling Griffons 
• 1 squad Hammers of the Emperor
• Demi company Sky Lords 
• Grey Knights company 
• The imperial cult (numbers unknown)
• 3 regiments Last of Sycorax
• 5 regiments Novgorod Guard
• 5 regiments Lycannon Guard 
• Praetorian 42nd regiment (Major-General Bloodnok MC VC OBE and bar)
• 3 House Stroganoff Lances
• 3 House Eagleclaw lances
• 1 House Corvus Lance 
• Adeptus mechanicus war cohort 
• 3 titans of Legio Dominus 

Overall ground forces: 220,000 men 

• battlegroup Barham

Necrons

• Ha'tek dynasty lead by Lord Baal. First Prime Teal'c (forces unknown)

Others: suspected genestealer infestation