Right this needs more
Who is:
The Chancellor?
The Senate?
The Grand Admiral?
The main general guy?
The Minister of Defence?
What is the majority vote in the senate on business (war, attacking Sith planets, etc.)?
As for numbers on the fleets... The Republic fleet would be pretty incredibly huge. As for the Sith, I'm not entirely aware of their state of affairs, which planets are under whose control, etc.