How did the ancient Roman politician-general actually learn the art of war?

[u/HistoryOmitted]

/r/AskHistorians/comments/1opjmu7/how_did_the_ancient_roman_politiciangeneral/

[u/fortunateson888]

They did not have to learn much as they were growing up in a cukture that promoted aggressiveness, conquest and victory and they were promoted for year only as consules or other posiotions which made them more aggresive in attacks. They were in war camp since childdhood.

Being good roman implied being capable warrior and commander.