▶▶ Pod 153 - Report:

The machine lifeforms not only infected the YoRHa soldier units on the ground, they also infected the <Bunker> with a viral attack, activating a self-destruct sequence.

With this, the 13th Orbital Satellite Base <Bunker> was destroyed. 

2B and 9S avoided infection from the virus and escaped the Bunker before it was destroyed. 
Proposal: Find the remaining surviving YoRHa Soldiers and start another descent-to-ground operation on Earth to fulfill the mission.
Allies who fought with me
for all this time...
‫الحلفاء الذين قاتلوا معي طوال هذا الوقت...‫
Die Kameraden,
die mit mir gekämpft hatten …
mis compañeros de armas…
mis compañeros de armas…
mes camarades d’armes
avec qui j’ai combattu,
e i compagni con cui
ho combattuto fino a oggi...
As aliadas que lutaram
ao meu lado até agora...
Товарищи, бившиеся со мной 
плечом к плечу…