Well, in my game, all the characters have horses (non-warhorse variety) but none of them have ranks in Ride, so the first round of wilderness combat is usually "dismount / fall off horse" ... and then after the combat the characters spend 15-20 minutes gathering all the scattered horses. They have a ranger with them, which helps.
In the game in which I play, the paladin's mount is one of those flying horses from Fiend Folio (I forget the name), so he gets quite a bit of action. My own character's horse got eaten by a behir, tho ... I was not a happy camper.
Every game session where there is combat. We have one elf fighter with Ride at a high level, plus the feats to back it up. We also have two faen sorcerers who ride Saint Bernards and are quite adept at casting from dog-back.
I occasionally have challanges that are mounted harry the PCs, like goblins on wolves to be cliche about it, but have never had a PC (whether as GM or while playing)even slightly interested in mounted combat. So from the PCs side of things: never.
In DnD, it started becoming frequent in my group once we saw the Wild Cohort feat. We don't care if it isn't supposed to apply to warhorses; we let it anyway.
I'm running a D20 Modern campaign set in the medieval environment, and every battle the PCs demand their commanders lend them horses. PitA, considering the small size of our battlemat.
Early this year. Valenar elves + PCs against Karnnathi humans and Talenta halflings. Sort of a combined arms fight, since some of the PCs preferred to dragoon it and others were using ranged weapons from their spelljammer skiffs.
Speaking of combined arms:
diaglo said:
1939. the polish used a cavalry charge against the german panzers. they got slaughtered.
Actually, the Soviets under Zhukov used cavalry against the German panzers later in the war and did pretty well with them. Of course, they supported them with planes, favorable terrain, decent anti-tank weapons, etc.