Alexander\'s Cavalry/Phalanx relations

[Felix]

As I recall, at Chaeronea Philip was with the phalanx in the center of the line, while Alexander was placed in command of the cavalry on the left flank; so in that case the king was not commanding the cavalry, although their role was crucial in the battle.

Alexander also had a corps of "foot companions", if I recall correctly; so the honors were shared among the infantry and cavalry. I am not sure if these were the hypapsists or part of the phalanx, off hand (my references are at home).