The emperor is sitting on a throne and there is an audience. You have a pool of "money" and "people". Various officials come to you and ask for resources, you decide (one by one) if to grant it or not. The trick is you don't know who will come next and how important the next request might be, so you can't determine perfectly how much mony you can still spend safely (maybe the last one will come with an info about an invasion?)
Military (fleet and land imperial infantry regiments) could be as "tokens". You don't move them on any map but "assign/borrow" to certain task (upon request). For example an official come in and says they might have detected aliens near planet X and request scout ships squadron. You would have 3 options regarding how many ships to send (if any), and then all the assigned ships will be locked (unavailable) for X days.