Archery in Classical Warfare

[Aryaman2]

It it not precisely an ancient theme but could you give me some sources for the all-purpose infantryman with crossbow and halberd? Never heard of it.

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I saw an old engraving (woodcut I think) showing a French Franc archer with a crossbow attached at his back (I don´t recall how) and holding a weapon similar to a halberd (with a small axe blade) but I can´t find it now. However I think that if a crossbowman could carry a pvise, it is not unlikely he could also carry a halberd or bill or some sort of short pike to hold in a battleline. Also swords could be very useful in assaults and close quarter fight in sieges and trenches.