Prothean War with the Reapers

Previous:	Metacon Wars
Concurrent:	Prothean Civil War
Next:	Battle of Kisi Hek'ri War
Prothean-Reaper War Part of the Galactic Harvest
Clockwise from top left: prothean troops launch a failed attack on a Reaper Destroyer on Rasputus; Javik Ple and his men hold off against indoctrinated forces during the Battle of Olos Trak; a Sovereign-class Reaper cleanses the countryside as it mops up refugees in the aftermath of the Battle of Trac Demere; prothean warships move to engage separatist ships at the Skirmish over Nexi Hallah
Date:	April 4, 60101 BCE - February 26, 51080 BCE (9021 years, 10 months and 22 days)
Location:	Galaxy-wide
Outcome:	Decisive Reaper victory Collapse of the Prothean Empire Extinction of the protheans and every other spacefaring species in the galaxy End of the Malantorian Era and the prothean cycle Creation of the prothean Collectors Several new Reapers are created, but Reapers fail to build a prothean Reaper
Territorial changes:	Status quo ad spatium fuga Galaxy emptied of all civilization
Engagements:	Fall of the Citadel Siege of Paravarvar XV Battle of the Carian Mining Belt Fall of Densoria Battle of Trac Demere Battle of Olos Trak First Battle of the Quasar Fortress Second Battle of the Quasar Fortress Third Battle of the Quasar Fortress Battle of Felsep Aethos Proxus Reos Campaign Fall of Malantor Prothean Civil War Hundreds of other engagements
Belligerents Prothean Empire Dominion of Densoria Dominion of Ehstag Dominion of Tosal Nym Dominion of Edolus The Reapers Inusannon Collectors New Malantor (in civil war with the protheans, indoctrinated by the Reapers) Commanders Numerous prothean ethnarchs, warrior-generals, warrior-navarchs, Archknight-commanders and Sage masters over nine thousand years The Great Intelligence Harbinger Sovereign Oblivion Vanguard Armageddon Desolation Primal Repentant Prometi Collector General Other named Reapers Numerous separatist warrior-generals, warrior-navarchs and sage masters over nine thousand years Strength Combined Imperial Starfleet 29,000 ships Combined Surface Legions 13 billion elite regulars 1 trillion non-prothean reservist troops Malantorian Elite Ethguard 2 million guardsmen Blade Companions 70,000 companions Archknight Order 10,000 archknights Hunter Band 15 combatants 1 ship Imperial Citadel Fleet 440 ships Imperial Citadel Guard 16,000 officers Erudite Armed Forces 14,000 armed militiamen Imperial Ministry of Armed Security 10 million troops Imperial Ministry of Intelligence 15 million personnel 217,589 ships 16 trillion husks of varying design by war's end 2 million Inusannon Collectors 4 Collector cruisers 4 trillion Prothean Collectors by war's end New Malantorian Irregular Army 29 million rebel troops New Malantorian Irregular Fleet 200-900 rebel ships Casualties All forces completely wiped out, huskified or indoctrinated. Only a few scientists on Ilos, a hundred warriors in stasis on Olos Trak and a thousand warriors on the Black Ark survive 2 ships destroyed, 1 damaged 900,000 Inusannon Collectors destroyed 94 billion husks destroyed All forces completely wiped out, huskified or indoctrinated

"When I was born, the Empire was already at war with the Reapers. I was born on our homeworld, Malantor. The first thing I ever saw was my world on fire."

— Archknight-Commander Javik Ple.

The Prothean War with the Reapers, also known as the One Hundred Twenty Thousand and Second Cycle by cycle name, to historians as the Prothean-Reaper War, and to the protheans as the Extinction War, was a devastating galaxy-wide conflict between the Prothean Empire and its dominions and the race of sentient starships called the Reapers. Only sixteen years after the end of the Metacon Wars, the Prothean Empire had only just recovered from the conflict and was currently in the process of several military suppressions of a series of coordinated rebellions. Deeming it time to launch the next harvest, Repentant, the Reaper vanguard of the cycle (and, unknown to the protheans, the instigator of the civil war), signalled the Citadel. The war began with the Reaper fleets pouring through the Citadel, wiping out the Citadel defense fleet and obliterating the Grec Fal Tama in one move, and quickly expanding outwards.

The war lasted for centuries, although coordinated military resistance ended two centuries into the conflict. The conflict ended with the complete destruction of the Prothean Empire and its vassals, with every spacefaring species driven to complete extinction. With the conflict over nine thousand years later, the Reapers left behind the new Collectors for the cycle, wiped the galaxy clean of evidence of their presence, and retreated back through the Citadel relay, leaving Sovereign behind as the vanguard for the next cycle. The conflict is noteworthy for being the last successful Reaper cycle: surviving protheans who had evaded Reaper detection managed to sabotage the signal that activated the relay, stopping Sovereign from signalling the next harvest fifty thousand years later. This action would alert the galaxy to the Reaper threat, allowing them to finally defeat them in 2186 CE.