What military innovation was employed by Philip that enabled him to take over Greece?

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Philip employed all of these military innovations to take over Greece. He improved siegecraft by using new technologies such as the torsion-powered catapult and more efficient battering rams. He equipped his soldiers with extra-long pikes, known as sarissas, which were 18 feet long and allowed for denser phalanx formations. Finally, he skillfully employed cavalry and phalanx together, creating a more versatile and effective army.

What Military Innovation Was Employed by Philip That Enabled Him