Things don't grow bigger from where we are now, on the surface. In all likelihood however, the various militaries will re-establish their support networks, forge new supply lines and so on, so that when the next wave of bloodshed comes they'll be in position to ramp up. Same size, less chaos.
The situation is slightly deceptive because the dark age caught everyone by surprise and most chains of command couldn't handle it. This lead to token militias and civilians taking the brunt of the fighting for a bit while the armed forces were out at their local pub.