So I've had a lot of secondary exposure to Wargaming. When I was a kid, an older friend created a WWII boardgame for mass battles. In our current WFRP game, I've had to look-up rules in the WFB rulebook. And in general, you hear occasional wargame discussions in RPG sites.
But when I watched this video of a WFB game the other day, I was surprised by how relatively smoothly this big 100-troop battle ran.
1. No Grid
I remember hearing that ODnD movement is in inches like a wargame, but I didn't really get what that meant until I saw this video. They actually each have a tape-measure and you can move your troops along any diagonal axis you want. That's pretty cool! And quicker than counting a ton of grid-squares.
2. Group Movement
The movement are per group, rather than per individual unit. That's a really good way of managing a ton of troops in a lightweight fashion. There's even a little rectangle underneath each group so you can move them together easily. I have to remember to do the movement by group next time I'm DMing and I run a big battle. Maybe that way it won't take all session.
3. Group Attacks
Attacks are also a lot quicker because they roll a handful of dice for each unit's attack. For WFRP, where it's a percentage, this might be a little unwieldy, but for d20 based systems it seems very do-able. Like when the archers fire, you can just roll a handful of d20's and then divide them up between the PCs. Or if a group charges the party's front line, then you can roll a handful of d20's and divide them up between the PCs in the front line.
So in conclusion, I think there is what to learn from wargames about running big RPG battles smoothly, and I'm excited to try this out next time I DM a fairly big action.