Masoul wasn't just an uprising; it was the starting of a war. Harmony didn't start on Masoul; they were using it as a testing ground.
Moretti has a lead on from where Harmony might have come. First, they need to defeat Harmony's forces in Osdal.
Nerva's not going to throw his people at Harmony; this is not just a colonist uprising, this is a well-armed and well-backed military. They need more information. It comes down to the Triple-Twos to find out that information.
Once again, the Victor brothers and their platoon will be right at the heart of Harmony.
Nothing will be the same after Osdal.