They all worked together to defend and nurse the orchard back to life, but an unexplained event involving 'trusting the wrong damn people' led to a betrayal of some sort, which is briefly mentioned by David in ' Above The Law' when explaining the group's history. Soon enough, using Clint's scientific knowledge of botany, Joan's charisma and David's military skillset, they officially founded 'The New Frontier' and formed its leading council.
Eventually, the group set up around a dying orchard on the banks of the Shenandoah River, where they were soon approached by two other survivors, Clinton Barnes and Joan. As time went on, more civilian survivors likely began to join, and due to the group's growing membership, they decided to look for a place to settle down.
The beginnings of the group can be traced back to the very start of the outbreak, when David teamed up with his close friend Ava and the rest of his old army unit it is likely that most of the these active or former soldiers went on to became among the first members of the New Frontier. Sometime after the outbreak, the group was officially formed by former soldier David García, along with two others, Joan and Clinton Barnes.