Achaemenid Organisation & Equipment - Spears

The main hand to hand weapon of the Persian infantry and their allied troops was the short stabbing-spear, about 7 ft in length fitted with a iron head. The reverse end was fitted with a counter weight of bronze, gold or silver. The spear is shown held one handed in an overhand thrusting manner in both Greek and Persian sources.

Link: http://members.ozemail.com.au/~ancientpersia/org_frm.html