Passage: Throughout the winter, the Carthaginians continued to build up their forces. They prepared a fleet in order to cut the supply routes and fully blockade the Roman army and were awaiting for mercenaries from Iberia and Liguria. The actual hostilities ceased for a time due to the efforts of Syphax to arbitrate for a reconciliation. Hasdrubal accepted the proposed terms, which stipulated that both Rome and Carthage should recall their armies respectively from Africa and Italy, but did not stop the aforementioned military preparations. Peace under such conditions was definitely not the purpose with which Scipio negotiated with Syphax. At first, he used the negotiations as a cover for trying to win over the Numidian to Rome. As these attempts proved to be of no avail, the Roman leader nevertheless continued to send envoys to the Numidian camp. Scipio aimed, firstly, to mislead the enemy that he was insecure and therefore anxious to conclude peace and, secondly, to reconnoitre the position and organization of the enemy. His envoys, who were carefully selected for the latter purpose, informed him that the both camps consisted primarily of huts built from wood, reed and other flammable material.

Question: What was built from flammable materials?
huts