Well the problem is that you could take several years for a siece , years to recruit troops , years to cross just Italy , years to manouver an army behind the other ... 2 - 3 years to set an ambush , decades to send a ship from a side to the other of the mediterranean , one yer to load troops on a shore on boats , another year to deploy them on the next shore ... , several years to build perhaps a temple , a fortification for the end of movement etc etc...
Sure Rome wasn't built in a day .... but come on ...
At least make double turns at years...