The following is a brief summary of what all has transpired prior to the game actually beginning.
Party members have agreed to join their respective recruiter's offer to join Operation Homefront. The next several weeks have been spent relocating to Freedom City's own Lonely Point Naval Base where not only have they been introduced to their fellow teammates, but to some of the key members that comprise the head of the operation itself as well. For the time being, the band of superheroes' new living quarters has consisted of a makeshift barracks contained within an isolated medical ward located in a very secluded portion of Lonely Point.
During their time spent at the military base, each of the party members has undergone a series of numerous examinations, each of which proved to be quite grueling. Among the list of ordeals that party members had to endure included a routine regiment of arduous physical and mental exercises, a thorough psychological evaluation, and an extensive series of inoculations. The good doctors informed you that the tests were necessary so that they may ascertain and isolate your individual capabilities and determine how they might aid one another in the days to come.
It was finally after a full day of signing numerous legal documents, each designed to secure each individual's loyalty to the US of A, that the party members were allowed a full day's R&R.