Yesterday I watched Hannibal with a friend, praising the movie for many things and complaining about the lil mess they made with unit placement(totally irrelevant for a movie but fun to nagg about). In the end I had to explain the whole Pre marian Roman army. I had to avoid mentioning the 50% Auxillaries as I noticed that they don't quite fitt into the rest of the army^^.
The deployment of Hasthati, Princeps and Triarii is clear, Velites and Equites are explainable aswell but considering the Allies are not equiped in the same way(and proportions) It seems hard to press them into the tight grid. The light infantry could run around with the Velites and the cavalry could easily integrate aswell but what about Heavy/medium infantry like PedExes Milites and Hoplitai

So how were the Allies Deployed? Just "next to" the romans?