So I had a question about phalanxes in general. Of course armies like Isengard and the Easterlings can phalanx better then say armies like Rohan and Harad, but my questions aren't very specific and are just about the effectiveness of phalanxes against other formations.
Phalanx vs Unformed
Phalanx vs Phalanx
Phalanx vs Line Formation
Phalanx vs Siege Equipment Surrounded Armies (Armies who's main hammer is their siege equipment with grunts surrounding them)
Phalanx vs Defensive (Natural or Buildings)
Any other information surrounding phalanxes would be appreciated