You spring into action, ensuring that all of the recently called up levy is armed properly, which for the most part they are. You below out orders, interspersing a few seasoned men among the levies to put them in good form, but retaining a strong core of your experienced soldiers to strike a hammer blow.
Acting quickly, you order strips of wool and garments to be cut, and supplied to each Archer. They also are to be supplied with a small lantern, candle, or torch. You bellow out for the Archers to spread themselves along the banks, behind fences, up in the watch towers, on small hillocks, and wherever else they will be difficult to hit. They are to try to set the boats aflame and force them to decamp downstream from the town. Your men scurry about, with the trained soldiers ensuring that your levy goes quickly but doesn't panic.
You form up your Halberdiers, a total of 80 men, inside the town, and explain that they will drive the enemy back into the river. The men seem to take heart at your bold and decisive action, and a sense of confidence runs through them.
As the Archers rush about, you pull aside one of the Rangers that gave the warning, and ask him how many men each boat held. He notes that they were shallow drafted river-craft, and he can't imagine more than twenty men being on each of them.
You nod, steeling yourself, and yelling for someone to help you into your armor. The battle will be coming shortly.
***
A flaming arrow arcs out into the river, sailing down onto the first longboat that has come into view. It thuds into the side, blackening the wood around it as a stout, bearded man leans over and attempts to bat out the flames. At this signal, a huge volley of arrows erupts from the banks, ripping into the longboats. From your position atop a hill just short of the town, you see several leather-clad men keel over in the assault.
The flames fail to catch the boats aflame, but the attention of the raiders has been drawn. You see the longboats angle over towards the shore, and you hear a guttural war-cry rising from them. You glance behind you at the eighty-odd Halberdiers tucked out of sight behind the hill. You sit astride your destrier, sword in your hilt, ready to command the battle. Your archers start to skirmish backwards, remaining out of range as several score of crude throwing axes fly towards the shore.
Your plan seems to be working. What will be your next step?