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Raid on Antibaar Part of the Armstrong cluster campaign of the Eden Prime War
The surface of Antibaar
Date:	1 July 2183 CE
Location:	Antibaar / Tereshkova / Armstrong / Milky Way Galaxy
Outcome:	Major Alliance victory Geth heretic facility on Antibaar destroyed Saren's Alliance forces expelled from Tereshkova system
Belligerents Systems Alliance Saren's Alliance Geth Heretics Commanders Marcus L. Shepard Brendan Chandler Unit Y5552 Strength Normandy Squad 7 combatants 1 M35 Mako Systems Alliance Marine Corps 72nd Expeditionary Force 3,000 marines 5 M35 Makos 10 M29 Grizzlies Systems Alliance Navy Battlegroup Raven 1 Normandy-class stealth frigate SSV Normandy 1 Melbourne-class heavy frigate SSV Melbourne 1 Saratoga-class light cruiser SSV Pyongyang 1 Geneva-class heavy cruiser SSV Cape Town Geth Heretic Army 2,000 geth troopers 300 geth destroyers 21 geth assault drones 180 geth hoppers 59 geth juggernauts 12 geth primes 6 geth armatures Geth Heretic Navy Heretic Reserve Fleet 5 geth light frigates 8 geth dropships Casualties 19 marines killed 3 M29 Grizzlies destroyed 1 M35 Mako damaged SSV Melbourne severely damaged All geth dropships shot down 3 geth light frigates destroyed, 1 crippled, 1 damaged All geth ground forces wiped out Geth outpost razed

The Raid on Antibaar was an attack by forces of the Systems Alliance on a geth heretics base located on Antibaar that occurred during the Armstrong cluster campaign. Due to the growing threat of Saren's Alliance, and the ever increasing incursion of geth heretic forces present in the Armstrong cluster which was likely a precursor to invasion, the Raid on Antibaar was the third of five engagements to expel Saren's troops from the cluster. The third of these engagements and larger in scale than the last two, Marcus L. Shepard and his men managed to neutralize the geth on Antibaar and razed their base.