The battle is characterized by two distinct waves that turned a standard planetary assault into a historic slaughter:
: Covers Corax and the Raven Guard’s desperate survival after the massacre. Goonhammer Reviews: Dropsite Massacre, by John French dropsite massacre pdf
The Dropsite Massacre (also known as the Isstvan V Massacre) was the decisive opening betrayal of the Horus Heresy, where the Warmaster Horus nearly annihilated three Loyalist Legions. Strategic Overview Location: Isstvan V. Date: Early 31st Millennium. Objective: To eliminate the Emperor’s most loyal forces and consolidate Traitor power. Facebook +1 The Combatants Side Legions Involved Key Primarchs Loyalists (The First Wave) Iron Hands, Raven Guard, Salamanders Ferrus Manus, Corvus Corax, Vulkan Traitors (The Second Wave) Iron Warriors, Night Lords, Word Bearers, Alpha Legion Perturabo, Konrad Curze, Lorgar, Alpharius Traitors (The Initial Rebels) Sons of Horus, World Eaters, Death Guard, Emperor’s Children Horus, Angron, Mortarion, Fulgrim Timeline of the Betrayal The First Wave: The Iron Hands, Raven Guard, and Salamanders launched a frontal assault on the Traitor positions on Isstvan V. The Arrival of Reinforcements: After heavy fighting, four more Legions (Iron Warriors, Night Lords, Word Bearers, and Alpha Legion) arrived, appearing to be Loyalist reinforcements. The Great Betrayal: As the exhausted First Wave retreated to the landing zone to resupply, the Second Wave opened fire on them. Simultaneously, Horus’s original rebel Legions counter-attacked from their defensive lines. The Result: The Iron Hands were almost entirely wiped out; Ferrus Manus was killed by Fulgrim. The Raven Guard and Salamanders suffered catastrophic losses, with only roughly 3,000 Raven Guard surviving the initial slaughter. Warhammer Community +2 Long-Term Impact Shattered Legions: The survivors of the three targeted Legions spent the rest of the war engaging in guerrilla warfare rather than traditional fleet actions. Strategic Shift: The massacre effectively removed three of the Emperor’s most reliable armies from the board, allowing Horus a clear path toward Terra. Warhammer Community For a deep dive into the specific tactical movements, you can find detailed lore entries on the The battle is characterized by two distinct waves
The "Dropsite Massacre" refers to the betrayal of the loyalist Space Marines by Horus's traitors on . Where to Find it Date: Early 31st Millennium
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Following the initial purge of loyalists within his own ranks on Isstvan III, Horus Lupercal retreated to the barren world of to bait a larger Imperial response. Seeking to crush the rebellion before it could spread, Rogal Dorn dispatched a massive retribution fleet consisting of seven Space Marine Legions. The Three Hours of Slaughter