The human armed forces have picked up the infusion of Na'vi into the area, from a number of hundred to 2000 within a day. At this level, the Colonel claims as he addresses his troops, the Na'vi will soon full 20,000, at which issue their perimeter will likely be overrun. https://blackinnovation.org/web-stories/avatar-2-will-have-to-be-one-of-the-highest/