as for the raiding/foraging thing.... foraging does mean to look for food not steal from towns come on people pay attention in english class.
First, you are one to talk about english, given your atrocious grammar and punctuation. Second, foraging is often a euphemism (can you say euphemism, class?) for stealing. Also, given the chance, a foraging party would take food from the other side's lands. Your interpretation is probably closer to what was intended, but his is not necessarily wrong.
What would be nice for forager motion (as an example) is that they spawn, roam around, stopping very often, and add food to their inventory. Once it is full, they should return to a town, which then spawns another party of a more militant type, size of the spawning party to be determined by how much food was brought in (which is based off of the size of the foraging party). Foraging parties should also spawn from warparties, and return to them often.
Warparties should spawn in only two ways-in response to another warparty or slightly smaller party (no warbands forming to kill deserters, for instance) entering the vicinity of the town, or to attack a town. The stated goal of the party is not to actually kill the town (with medieval technology that would be quite difficult), but to rape, pillage, and burn the lands around the town. That task done, they return to friendly land and dissolve into multiple smaller armies.