Hi WuZhuiQiu
Rules don't contain a campaign system, but I'm used to building that sort of thing from all my scenario packs for I Ain't Been Shot Mum.
What I have done is to write a series of individual scenarios (eight so far, twelve intended) each containing an introduction and game notes; a briefing for each side; a map; and army rosters. The scenarios are loosely tied together with background information, game notes and consistent commander and unit names.
The outcome of one game doesn't affect the next (so that one can dip in and replay a favourite without having to worry about taking into account the result from previous games): so the player briefings are deliberately vague as to who won previous encounters or they are described as inconclusive clashes. After each battle, each side falls back to regroup, with then one or other commander taking the initiative to set up the next encounter.
The battlefields are taken from places round where I live, with Google Maps giving the basic shape of the field which I then adapt for an FK&P grid.
The two playtesting teams all seem to have enjoyed themselves so far, so it looks as if I might be doing something right!
Cheers
R
PS I've added a Pike & Shot category to the blog.