Played any of the Total War games my friend?
But there is nothing in total war that you can't achieve by simply ploughing across the map with amassed armies, even on the hardest difficulty. Diplomacy, assassinations, marriages, secret alliances and bribery (etc) are not essential on total war (and are generally quite basic) which cheapens them in my opinion.
This game promises that "your political prowess will be as important as your strategic and military skills!"
and hopefully it will hold true to that promise. Because im yet to come across a strategy game where that is entirely true.