Cataphract, Clibanarii, whatever, against Infantry

[marka]

There is a famous one in Xenophon- either the Hellenica or his hagiography of Aegesilaios. A Greek foraging party was cut to pieces by Persian cavalry and two scythed chariots. Scythed chariots were used for 300 years by many armies so there must have been something to them. But they are a good example of horses charging ancient spearmen and pikemen.

a greek foraging party would have been in open order and somewhat isolated so vulnerable to cavalry anyway.
close order phlangites or legionaries are an entirely different matter.
granted the egyptians and ancient britons found chariots useful but these could easily be countered by missile troops.