I'm playing Julii M/M and the Brutii haven't taken any new cities. Scipii has taken Sicily and Corinth (!??!). They marched a half stack all the way from Capua to Corinth and took the city from Macedon. Go figure.

Bruttii has marched armies to Greece, but they haven't taken any cities.

I tried to jumpstart Brutii by giving them the town north of Appollonia but they wouldn't take it. I didn't try to trade for it; I gave it to them as a gift and they wouldn't take it! The Senate wouldn't take it either, nor would the Scipii.

I'm allied with Macedon, and when Bruttii attacked them, the Senate and Brutii broke alliances with me. Scipii also attacked Macedon and then broke their alliance with me.
After they broke the alliance I tried to start the civil war but the game wouldn't let me (not popular enough).