Why Did the Phalanx Become Obsolete?

But the main reason the 'Greek' or classical phalanx fell out was the Macedonians. They took the deeper Theban formation and combined it with the pike which resulted in a much nastier force. But more importantly they fielded an 'all-arms' force with good heavy cavalry, light cavalry, good skirmishers.

Why did phalanx stop being used?

The assumption behind this question is that Rome initially used the hoplite phalanx in battle, but eventually abandoned it in favour of deployment in maniples, which were supposedly better suited for the hilly Italian countryside.

How was the phalanx defeated?

At the Battle of Cynocephalae in 197 BCE, the Romans defeated the Greek phalanx easily because the Greeks had failed to guard the flanks of their phalanx and, further, the Greek commanders could not turn the mass of men who comprised the phalanxes quickly enough to counter the strategies of the Roman army and, after ...