Hello! I'm playing a campaign as Sparta. Rome declared war on me, and they started sending fleets and armies to my shores. Everything felt normal and fun at first. I transitioned from being a defender to an attacker and launched a campaign in Italy. My armies were advancing into Italy, but there was no response from the Romans.

I noticed that a Roman army remained stationed at the border for several turns without moving. I placed one of my armies in front of two strong Roman armies, and I was worried I might lose it. Yet, the Roman armies did not move to engage me, even though I was vulnerable. I couldn't help but feel that this might be a bug, or perhaps the Romans had some strategy in mind that I wasn't aware of.
I can see they have more than like 4 or 5 armies and yet non of them moved to attack me.