Field of Glory is a old, like old old styled series. It started off as a battles-only wargame which is basically a simulacrum to classic historical wargames you'd otherwise play on a table, except it was and still is built to allow even play by email.

It has a very simple graphical layer on top and a entry or two have a campaign mode slapped together for it, the campaign is decent but nothing special.
I'm not sure if i'd buy it if i had to today, but i got a bunch of disks for it years ago for like 5$ on a resale. The multiplayer is great and the wargame rules are decent, not spetacular but decent, and it benefits from the magic of not relying on dice allowing for slightly more complex calculations.

Its a nice pick up and fight a buddy for a few battles, or a battle a week. The themes are varied across the series.