If you check out the etching by Durer, several of them look like Andalusians.
Read Terry Pratchett and Neil Gaiman’s “Good Omens” to find out what happened to the other four bikers of the Apocalypse.
silenus got it right. Harley’s. Big-ass friggin’ Harley’s. Stroked and bored out to about 120 cu’s. Thunderheader pipes and a Screaming Eagle package. Make your ears bleed Harleys. Got the front forks out about 6" and kick-ass ape hangers. Some blonde hard body in a bikini leaning back on a bad-ass custom one of a kind sissy bar.
I’m not the horseman or military historian to answer this, but I think that the horses would have looked a lot like Belgian Drafts. Battle mounts tended to be big so that the soldier and his equipment would have a sturdy mount in battle.
Then again, Saint John specifically mentions that War is riding a charger, so the other horses may have been smaller. Also, my copy of Horses of the World mentions that Julius Caesar did not favor the use of mounted troops and that cavalry wasn’t used extensively by Rome from ~50BC to 476AD. St. John may have had some other military force in mind when writing Revelation.
Pat Robertson and Hal Lindsey probably consider them Arabians.
The Salvation Army would think Clydesdale.
But there are four of them dividing the end of the world so they’d have to be Quarter Horses. Especially since you’d want something good at cutting’ from the herd.
There’s no foaling you.
The times? Bikers of the apocalypse are so… seventies; if they came tomorrow, they’d be riding Segways, or maybe they’d just TeleCommute.
The four TeleCommuters of the apocalypse.
As we all know it, they are The Roan of Civilization.
Sad really, bunch of neighslayers.