1) Greek invention 2) Macedonian pike 
pike; Macedonian heavy thrusting spear used by both mounted troops and infantry.
(from the article `spear`) ...used by Sumerian armies as early as 3,000 . Two thousand years later the Greeks refined the concept, using pikes 6 to 9 feet (2 to 3 m) long. ... ...used wagons, despite a tradition that Philip had forced his soldiers to carry their own provisions and equipment. The core of the infantry was the ... [2 re...
Macedonian pike.
A two-handed spear or pike of Macedonian origin used by the Macedonian phalanx.