At this time, the Alliance felt no pressure. The mainstream opinion believed that with the Empire gathering such formidable strength, the current situation favored the Empire, and the rebellious Iron Fury Stone was already in a countdown to destruction.
Whether the Alliance participates in the war is no longer important; not participating might even mean one less force to share the spoils of victory. Furthermore, they could use this as a point to attack Prime Minister Galaraldo... why not?
The 'continuous meetings' Tadeusz mentioned referred to this stage.
The Alliance was also anxious, worried they might not make it in time to claim a piece of the pie; in Holy Terra, Galaraldo was feeling anxious too, having contacted the Alliance several times to inquire whether there was a need to change strategies.
And it was during this phase that Gu Hang, as the supreme leader, made a decisive statement: continue to maintain the previous strategy.