Source A: Julius Caesar, The Gallic War 1 (a battle against the Helvetii in Gaul, 58 BC)
'The soldiers threw their pila from the higher ground and easily broke through the enemy's close formation. When it had been scattered, they drew their swords and charged. The Gauls were greatly hampered in the fight, because several of their shields had been pierced and pinned together by a single pilum; since the iron had bent, they could not pull it out, nor fight properly with their left hand weighed down. So many of them, after shaking their arm for a long time, preferred to let the shield drop and fight with their bodies unprotected.'
What does Source A suggest about how effective the pilum was as a weapon? Make two points.
Model answer
Source A suggests the pilum was very powerful, because 'several of their shields had been pierced and pinned together by a single pilum'. It also suggests that it took away the enemy's protection: since the iron had bent they could not pull it out, so many of them 'preferred to let the shield drop and fight with their bodies unprotected', which left them open to the Roman swords.
Explanation
Caesar shows exactly how the pilum was meant to work: a volley broke the enemy formation, the bent soft iron shank pinned and weighed down the shields, and the charge with the gladius followed. Good answers make a clear point and back it with a precise quotation; the passage is from the late Republic, but the pilum was used in the same way by imperial legionaries.