The game is Territories: there are depots that must be claimed by each team. For this thread I will main focus on the ideal of three teams.
First we have the depots: 12" lengths of 3" PVC taped to an 18" wood stake.

I made ten for the configuration I have planned. And you get this many from a full PVC length.

Here are the markers. This game was inspired by Demon lord's efforts at a MN war and me having an absurd number in 2' lengths of 3/4" PVC from making mobsticals. Here are 10 of each of the three team colors.

OBJECTIVE: run around and "claim territories" by putting your team's colored marker upright. Here you cam see blue and green are tied 1 to 1.

Here pink has made some solid grabs.

Here is a configuration map. The orange are depots, the squares are modsticals, and the big circles are team-neutral spawn points with 10' no-hit zones around them to be marked with orange soccer cones. All depots start with all neutral markers.

Other points:
- there is no set size, but for the war the max size we can get is about 200' diameter based on the area we will be in. I would have liked 300' but whatever.
-easily converted to two teams, or have an odd man out be a 'blighter' who converts depots back to neutral.
- all teams start from a spawn point as opposite from others as you can get.
- 20 min time limit, unlimited instant respawn, most held territories at the end wins.
So that's what I got. Hopefully I just shaved 5-7 minutes of down time off the war and got your gears turning on strategy.