Official Server Timeline

Red = Only high ranking MPF know these events in their entirety
Yellow = Civilians hear rumors of this, but no proof of it fully exists

First portal opens in the research complex of Black Mesa to the Xen universe after an unknown scientist adds an unknown material to its suggested test chamber. The military intercedes during the alien incursion. At some point, the unknown scientist dies as did most of the Black Mesa staff. It is unknown what ends the portals from opening but shortly after this, Black Mesa detonates an on-site nuclear warhead to cleanse the area. The portals attracted the attention of the Universal Union.

The Universal Union invades, portal storms rocking the planet. The world fights back, but all the militaries fall within seven hours, marking the end of the Seven Hour War. City isolations and citizen roundups begin. Many minor cities are left abandoned or occupied for non-civilian use. A silent purge occurs, killing the incredibly young, the incredibly old, and many of the mentally and physically infirm. This purge is kept secret from the civilians that are left and there is no official announcement made to confirm the reasons behind the loss of family and friends.

OTA forces are removed from cities, MPF forces are established from volunteers. Conscript forces are removed from active duty and are either kept in locked complexes within cities or in outland complexes. Cities officially gain a numerical designation. Cities 1 - 45 are established all over the world.

City Administrators are now being picked by the Union, either from an existing pool of quality and charismatic leaders, or from the best options available in the UCN. City 12 goes dark after a necrotic breach occurs and the protective forces fail to contain it.

UU introduce Striders to all cities in response to City 12 falling to a necrotic breach. Combine technology becomes more common and forcefield checkpoints are now commonplace.

The outlands were already off-limits at this point, but the final sweeps to capture any remaining citizens not found during the original sweeps come to an end and now any citizen seen in in the outlands are considered anti-citizens. Cremator gear is now being manufactured by the current child populace due to the simplicity in the manufacturing process.

Cremators are now deployed regularly throughout cities. They are seen most commonly at night as well as being deployed outside of cities to burn bodies.

City 8 successfully repels a necrotic breach, locking down the city for a few years to investigate the major breach. City 26 is opened to transfers for the first time.

The UU makes the UCN and UW more accessible to citizens. The first generation of MPF officers are offered transhumanization for their loyalty. A Citadel is founded in an unknown city, becoming the hub for all Union activities. Plans to build more are rumored. City 26 adopts the CTS MPF structure, focusing on technology, riot control, and standard patrols.

Two cities (City 1 and City 18) go dark, but are successfully evacuated. City 1 lost control of its parasitics and as the Union attempts to regain control, a major exogen breach occurs, forcing them to evacuate. City 18 loses power citywide and it appears to be sabotage. The evacuation train is lost in the outlands and all MPF officers on-board captured or killed. Whispers of resistances in the outlands begin, but they are too unorganized to come together so members fail to cause any major difference within the cities. City 26 sweeps multiple city blocks, closing off the slums as they plan to handle the issues within.

A member of the alleged resistance is captured and interrogated. It appears they are organizing, but also struggling to gather resources required to survive. Outlands MPF established to cut off any smuggling routes to and from cities to kill as many controllable routes as possible. City 2 does the Union's first major transfers, sending out every single citizen to other cities as well as pulling many civilians from other cities. Some families are reunited in City 26 as the family separation law is repealed early.

Current day. A necrotic breach occurs in City 26 but is quickly quelled by MPF forces. The city considers locking down transfers but has refrained from doing so as of current. A dissident is captured and interrogated within the city, the man having notes and research about the Union. Flawed at best, but his intentions were clear. The man is amputated.