The line of march was dangerously stretched out – estimates are that it was more than 15 km (9 miles), and was perhaps as long as 20 km (12 miles). It was then suddenly attacked by Germanic warriors who were carrying some light swords, large lances and spears that came with short and narrow blades, so sharp and warrior friendly that they could be used as required. The Germanic warriors surrounded the entire Roman army and rained down javelins on the intruders.