Timeline for the Ethereal Collective Invasion

## XCOM: Hades Contingency

* December 2014
	+ First Contact/Abduction
* March 2015
	+ March 1st: XCOM is activated
	+ First Contact: Drone
* April 2015
	+ Zhang is recruited into XCOM
	+ XCOM Intelligence is established, with Zhang as the Director
	+ First XCOM Satellite launched
* May 2015
	+ Van Doorn joins XCOM.
	+ Internal network breach within the Citadel occurs, first suspected cyber attack from EXALT.
	+ Terror Attack: Hamburg
* June 2015
	+ Hades Contingency activated, German government captured
	+ Alien Abduction: Saudi Arabia
* July 2015
	+ Alien Dreadnought detected on course for China
	+ Operation Gangplank
	+ Patricia awakens as the first Human Psion

## XCOM: Atlas Protocol

* August 2015
	+ Herman Diderick, the Council’s watchman, arrives at the Citadel.
	+ Cerian Irelan is recruited to investigate the Commander and XCOM by Patrick Rush.
* October 2015
	+ Initial experimentation with MELD begins. Shen draws up plans for the first MEC suit.
* November 2015
	+ Operation: Playful Cocoon, first open conflict between XCOM and EXALT
	+ Myra Rodriguez becomes the first MEC pilot, albeit with complications.
	+ EXALT Raid: Russia
* January 2016
	+ EXALT Raid: Japan
* February 2016
	+ EXALT Base Assault: Mercado Estate
	+ Sectoid Hive Assault
* March 2016
	+ The Ravaged One takes command of the Collective’s operations from Sicarius
	+ Operation: Enduring Tomb
* April 2016
	+ Terror Attack: New York
	+ Cerian’s cell eliminated by Chronicler. Ruth Shira killed.
* May 2016
	+ Citadel attacked
	+ Aegis defects
* June 2016
	+ Australia is invaded outright by the Collective, beginning of the open warfare phase of the invasion. First deployment of multiple Ethereals onto a battlefield.

## XCOM: ADVENT Directive

* June 2016
	+ June 19th - The Demeter Contingency is activated, the Council of Nations is eliminated.
	+ June 24th - Unification Day. ADVENT is established, with the United States, Russia, South Korea, Armenia, Taiwan, North Korea, Israel, Germany, and Brazil as the charter members.
* July 2016
	+ July 11th - Japan joins ADVENT
	+ July 13th - First Battle of Japan
* August 2016
	+ August 1th - First Battle of the United States
* September 2016
	+ September 4th - Battle of Paris
	+ September 5th - Second Battle of the United States
	+ September 10th - France joins ADVENT
	+ September 18-19th - End of ADVENT-Middle East War, Operation Deus Vult
	+ September 20th - Second Battle of Japan
	+ September 23rd - PRIEST Division is established, begin training the first wave of ADVENT psions
	+ September 28th - Austria, Ukraine joins ADVENT
* October 2016
	+ October 7th - Canada is annexed into ADVENT, citing unfit leadership and refusal to assist in the war with the Collective.
	+ October 8th - Betos and the Traitor Legion desert their posts within the Middle East, head south across Africa.
	+ October 10th - Iceland joins ADVENT
	+ October 12th - Ireland joins ADVENT
* November 2016
	+ November 6th - Third Battle of the United States
	+ November 11th - Marshal Luana Russo of Brazil is removed from power for treason and unlawfully invading foreign powers.
	+ November 21-23rd - Operation Kamehameha, Operation Sherman, First Battle of South Korea. PRIESTs deployed en masse for the first time.
	+ November 21st - Washington DC attacked, President Treduant is killed.
	+ November 27th - Chinese-ADVENT coalition launches Liberation of Japan, Caelior captured by XCOM forces
* December 2016
* January 2017
	+ January 5th - The Tenth Crusade is issued by the Pope,
	+ January 8th - The Seoul Massacre
	+ January 18th - Greece, Italy join ADVENT
	+ January 19th - Poland joins ADVENT
* February 2017
	+ February 5th - Phantom Division, Volk attacks ADVENT convoy, Abbigail Gertrude captured
	+ February 7th - XCOM-ADVENT assault Nebulan’s base in Argentina
	+ February 22nd - Patricia Trask joins the Imperator.
* March 2017
	+ March 7th - Isomnum invades China
	+ March 12th - Pantheon deployed for the first time. Isomnum killed, ADVENT reclaims Beijing
	+ March 18th- Assault of the Harbinger, over 60 XCOM soldiers massacred, Caelior captured, XCOM Head of Engineering Raymond Shen killed, Patricia Trask’s betrayal publicly revealed. JULIAN is brought online, unshackled.
	+ March 19th - T’Leth attacks Australia, millions of Collective soldiers dead, various Collective military installations destroyed
	+ March 25th - Siege of Florida begins
	+ March 26th - “Abigail Gertrude” is reborn.
* April 2017
	+ April 30th - Temporary Ceasefire agreed between ADVENT/XCOM and Collective forces. Commander and Yang Shuren exchanged for the duration as collateral.
* May 2017
	+ May 4th - Ceasefire ends, collateral returned.
	+ May 7th - Project GAIA is activated, Avatar Ivan Smirnoff is killed.