Roman dogs deploy first, having lost initiative.
The legionaries march onto the field. Let the Spanish scum know where they are; we'll slaughter anything that comes at us! They've actually lined up opposite the brush since it will be slightly better fighting in that than on brush-covered hills. In the distance the Romans can just make out the Spanish supply camp. Roman camp is just right of the legionaries.
First Spanish to reach the battlefield are Light Horse and Light Foot.
LH and LF deploy on the Spanish right flank, just at the rear edge of the hills. If the going gets bad, the hills will be a good defensive point. One other BG of LF is deployed on the far left flank of the Spanish, just in front of the steep hill.
Second Roman Deployment of 3 more BGs:
The Roman LH deploys on the Roman left flank (still in the shade of the early morning

). It sure won't want to go up into those hills, but hopefully can delay for as long as necessary. The plan is to support it with some Cretans just to their right. As well, the javelinmen deployed in front of the legionaries.
Second Spanish Deployment (from the Roman lines):
From the Roman centre, Spanish heavy cavalry appears on the Spanish left flank along with some heavily-packed foot...our bets, Celtiberian riff-raff!
Again from the Roman centre, they see more infantry forming up behind the hills. Slightly less heavily-packed...ye olde standard MF n'est-ce pas?
Third Roman Deployment (seen from Spanish positions):
A battlegroup of offensive spears and a battlegroup of very drilled-looking archers take their positions in the Roman lines.
Third Spanish Deployment:
The slingers take up positions in the brush. (Don't look tooooo closely at them...they seem to look an awful lot like old Roman velites! Eventually the slingers will get painted.) One BG of MF form up behind the slings.
Final Roman Deployment:
The Gallic heavy cavalry form up on the Roman right flank, though they look a tad outnumbered when gazing across to the other side! Pompey joins one BG and Memmius the other. Romans win this flank or else there'll be no Pompey the Great!!! Last Roman TC joins the legionaries.
Final Spanish Deployment:
From the Roman lines that area of brush sure does fill up with Spanish mobs! Now, if the legionaries can just get into them before anything disastrous happens on the flanks! Eagle-eyes Romans spot that renegade Sertorius with his heavy cavalry. No doubt his other once-upon-a-time Roman commanders are with those BGs in the rough.