A sarissa is a long spear that was primarily used by the ancient Macedonian army, particularly during the time of Philip II and Alexander the Great. Typically measuring between 4 to 7 meters in length, the sarissa was designed to give soldiers a significant reach in battle, allowing them to engage enemies from a distance. The introduction of the sarissa revolutionized warfare in the ancient world, as it enabled the Macedonian phalanx to maintain a strong defensive line while attacking. This weapon was often paired with a shield and used in formations that maximized its effectiveness, contributing to the success of Macedonian military campaigns.