Is there a mod which fixes AI lets you do single small raid parties, single large battle at one place . But no war

[Asssssssbigone 9]

You see  in history majority of  medieval battles were large(30k soldiers) and entire armies met at a single place and one who won would completely annex the land .   And some were just minor or major plundering raids now suppose if i wish to recreate this i cant because once you take hostility against a civilization its a all put war where dumb AI invades from all sides  with small armies instead of meeting at a single place  with a large army like most medival battles and  win.