What is a Bulk? A heavily armed foot soldier of ancient Greece.What is Phalanx and what is it used for? A phalanx is a rectangular formation with heavy infantry, which are armed with spears, spikes or sarissas.What are the strengths and weaknesses of using a phalanx style of fighting?Strengths: The front of the phalanx proposed an impenetrable wall of spears and also had good strength to force enemies back. Also the first rank had sarissas, which were used to protect them from missile fire.Weaknesses: The fatal flaw of the phalanx is that it had no protection on the right wing. The shields protected the left so there was nothing to protect on the right.Why according to source A, did a Greek hoplite need to be well off? They needed money to afford their own armour.