When I was reading some mid-Republican stories, it always fascinated me how every other year, a Consul (Or Proconsul) could be sent to Spain or Transalpine Gaul with a couple of fresh legions. Every other year, it would require tens of thousands of soldiers to keep those areas occupied? I also saw references to young senators serving ten times by the age of thirty. Ten times of a couple of years each, and they've soon served for longer than they've lived. It puzzled me how this system could ever work... Until I realised how often the early and mid Republic disbanded soldiers, that is. That for the most part, a campaign was a year or even just a season. The long campaigns of Sulla, Pompeius and Caesar were aberrations, essentially, building on the Marian doctrine of soldiers who could serve for longer because they didn't need to go back every other season.I think this is key. People tend to conceive of the Roman Legions as fixed formations, when in reality they were raised, disbanded, reformed, destroyed, disbanded again, reformed, etc. multiple times over the course of Roman history. During the wars between the Triumvirs legions were raised whole cloth using cadres of veterans. It wasn't until after the scope of this game that legions began having fixed names and territorial assignments as the rule rather than the exception.
You could also have an interesting dichotomy between established generals and professional soldiers. Historically, time and again professional soldiers defected to generals like Antony over generals like Lepidus because of Antony's reputation among the rank and file. In this way conscripts or raised citizen-soldiers may be more loyal to the player's chosen general since they are less likely to defect to a general they like more.
I think it hit me, when I read McCulloughs Masters of Rome series, how little stability was in each individual Legion.
I'd like that to be an actual possibility in R2. An early Rome on campaign would have a war that takes a year or less, and disband their troops. Maybe a few permanent garrisons against the Gauls, but not a standing army. Then, when they had another Samnite War, or another campaign in Cisalpine Gaul, you raise a couple of Legions for pennies, go off campaigning, and then disband. You'll have a conscious choice to stay "easy" in Italy, where a war takes a season and your soldiers stay loyal, or whether you build your empire and need to manage the permanent soldiers and their rebellious commanders.
I agree that a full time volunteer and a full time conscript are mostly identical in fighting ability, but their pay and place in society may not be. Modern day armies pay their conscripts, the US makes various promises of education stipends or veteran benefits to get people to volunteer, etc. They pay the price for that standing army. The US army would collapse if they required their soldiers to arrive with their own equipment and get paid a pittance, as a part of civic duty. The Roman Republic managed that for centuries.The division between professional and not means little in the era and people, essentially, wank to the idea of a standing army becaus they imagine a modern military. And they imagine, specifically, the USA. But even in the modern world the distinction between professional and conscript is often minimal. A conscript who serves full time has almost no difference in skills or training than a volunteer, while a part time volunteer is simply going to not be as good as someone who is a full time soldier
In the context of the ancient world, standing armies in the way people equate to modern militaries are vanishingly rare. Imperial Rome did not have one, and this is pre Imperial. A legion garrisoned in its region would commit to... farming and building infrastructure like anyone else in the area.
Even the vaunted Spartans were.... mostly duds who managed to states, wrote poetry, and farmed. Their claim to fame was a ‘mastery’ of the oh so difficult technique of.... marching in formation to music. Something that was beyond most Greeks.
And you have to ask yourself, is there a difference between a person who was conscripted ten years ago and has been fighting with Alexander and someone who ‘volunteered’ for the same period?
Naturally that system had some requirements of both society and the wars they were fighting. Mobilising without real pay is fine when the war is over in two months, travel takes a few weeks each way and your family can tend to the farm during the growing season. Mobilising for a year or more means hardship.
However, while I don't think comparisons to modern militaries are in order, I do think Republican Rome ended up having essentially standing armies some time between the Third Punic War and the turn of the century BCE, but without the necessary reforms to deal with that strain. Macedonia, Transalpine Gaul, Cisalpine Gaul, Illyria, Africa, Asia Minor and the Spanish Provinces were all recent conquests (Or inheritance, in case of Asia Minor), with some soldiers serving several years (Just take Numantia as one example). That was one of the issues that gave rise to the Gracchi brothers, and when Marius had to raise legions for Africa, there were no more soldiers to mobilise - they were either in the field already, too old, too young or too dead.
Marius had his soldiers on campaign in Numidia for 3 years (107-104), then against the Cimbri and Teutones for 4 years (104-100). I don't know what you'll call an army in the field for 7 years in total, but in my book that's a standing army. Sulla had his armies in the field during the Social wars (91-88) and the Mithridatic War (87-84) and then his second march on Rome (83-82), or 9 years in total. You can do the same calculations for Pompeius against Sertorius and Mithridates, or Caesar's Gallic Wars, or Lucullus, or... any of the commands longer than a single year since 149, really. Moving several legions back and forth from Iberia or Anatolia was proving to be so impractical, the logistical effort of raising and moving several thousand soldiers back and forth a waste of time, that the soldiers were kept on longer and longer campaigns.
It's no coincidence that social unrest and constitutional crises began just a few decades after these long campaigns began to look permanent. It's no coincidence that the longer campaigns mostly happens after the Marian reforms change the need to get back from campaign to tend to crops. It's no coincidence that the change happened when the Roman provinces could pay for the vast upkeep of these armies.
While each Legion was still disbanded and a new recruited, however, the timescale was changed. From less than a year, to a year, to two, then four and nine... During Caesars CIvil War, some of his oldest legions had served when he went to Gaul the first year, some had just been recruited. Some of those Legions again would serve during Augustus' Civil Wars. What would you call a force raised continually for 10, 15 or a few even 20 years, if not a standing army?